Dear Fellow Diver: 
Serious divers often find themselves in Aruba on a compromise vacation, to
  appease that nondiving spouse. Aruba is known for its casinos, beaches, hotels,
  restaurants, and even golf. And nondivers often insist on that kind of vacation.
  Sometimes even divers do.  
Most Aruba operations cater to novice divers. But then there is S.E. Aruba
  Fly 'n Dive, operated by John Oster (aka "The Flying Dutchman") who caters to the
  Dutch, who take the sport seriously. During my August trip, they conducted the
  onboard briefings in Dutch, but nearly all Dutch are fluent in English, so I got a
  first rate translation. You need to be an independent diver here -- the crew on
  the 34-foot boat didn't have to do much to prepare us, as these well-trained Dutch
  divers all set up and broke down their own equipment. When we arrived back in the
  harbor, they cheerfully joined the crew in unpacking all the dive gear, tanks, and
boat items and washing and stowing them on the van heading back to the shop. 
Oster takes his charges to other than just the basic sites. A more challenging
  wreck dive was on the Jane C, a 250-foot cement freighter in 90 feet of
  water.  The coral was spawning, and I swam through a massive school of silversides
  that swirled around the uppermost part of the wreck. Rock beauties and queen and
  French angelfish, as well as schools of sergeant majors, made the wreck home. The
  Blue Reef off Malmok,
  an area of Aruba known
  for its exclusive housing,
  is chock full of
  orange, red, black, and
  brown sponges, as well
  as purple azure sponge.
  Inside vase and barrel
  sponges, I found brittle
  stars and other
  critters waiting for
macro photographers.
The coral was spawning, and I swam through a massive school of silversides
  that swirled around the uppermost part of the wreck. Rock beauties and queen and
  French angelfish, as well as schools of sergeant majors, made the wreck home. The
  Blue Reef off Malmok,
  an area of Aruba known
  for its exclusive housing,
  is chock full of
  orange, red, black, and
  brown sponges, as well
  as purple azure sponge.
  Inside vase and barrel
  sponges, I found brittle
  stars and other
  critters waiting for
macro photographers. 
In my quest to get
  to more challenging sites,
  I joined a SEAruba shore
  dive off Baby Beach on the
  southeastern tip.
  Following the morning
  truck ride, divemaster
  Steve Vanderauwera guided
  us through the opening in
  the reef, then down a
  sandy dropoff into a coral
  channel. In a healthy
  current at 50 feet, I
  spotted a southern
  stingray and then a 4-foot
  blacktip shark cruised by.
  Huge 6-foot brain corals
  and large stands of pillar,
  staghorn, and elkhorn
  corals dotted the landscape.
  Hefty sea fans and
  sea rods waved in the current.
  Small schooling
  reef fish abounded,
  including French grunts
  and blue and brown
  chromis. A green turtle
  greeted us, and I also saw
  king mackerel and a school
  of Atlantic spadefish.
  Half swimming and half
  drifting with the current
  brought us to our exit point. I grabbed a large underwater cable that runs from
  Aruba to Venezuela and inched my way toward shore while being pounded by the
  incoming surf. After a surface interval with refreshments, we repeated the dive,
and I spotted a trio of barracuda and an orange frogfish. Visibility ran 60 feet. 
The Fly 'n Dive part of the operation flies you to Bonaire at 2,000 feet for
  $250/person including two dives. We departed after 7 a.m. aboard a four-seater
  Piper Aero for 70 minutes (return with the trade winds, about 50 minutes), returning
  about 7 p.m. In Bonaire, John rented a small truck, and we drove to the Plaza
  Resort (www.plazaresortbonaire.com) in Kralendijk for a shore dive. A trio of silver
  tarpons buzzed us as we dove along the reef wall in 70-foot visibility. Our
  next dive was at the Oil Slick with its unique entry (a jump off of a 10-foot
  cliff into the water) and exit (through a stationary ladder on the rock wall).
  This dive site also had a good representation of sponges, especially purple tube
  sponges, and plenty of tropical fish and a green sea turtle that finned by us near
  the conclusion of our dive.  
We ate lunch and loafed at the Eden Beach Resort, and then John conducted an
  impromptu tour of the downtown Kralendijk restaurants and bars, giving his recommendations.
  He led us to the Dive Inn Bonaire and introduced my fellow divers to
  "Big Boss Babs," the owner of the Dive Inn, where the other passengers on the
  flight were staying for a few days. We departed Bonaire about four hours after my
  last dive, taking in the spectacular views along the way.  
Aruba is great for the classic tropical party vacations. The "Kukoo Kunuku" party bus carries noisy revelers
throughout downtown Oranjestad to dinner
and bar hopping each night.  Many
party boats specialize in sunset
"booze cruises." Virtually every large
hotel has its own casino, and the
Alhambra and the Crystal casinos also
feature live nightclub acts. There is
no lack of great restaurants on the
island, and the chefs compete among
each other for the most acclaimed cuisine
(www.restaurantsaruba.com).
Many
party boats specialize in sunset
"booze cruises." Virtually every large
hotel has its own casino, and the
Alhambra and the Crystal casinos also
feature live nightclub acts. There is
no lack of great restaurants on the
island, and the chefs compete among
each other for the most acclaimed cuisine
(www.restaurantsaruba.com).
Should the fate of an Aruba
  vacation befall you, you can assure
  yourself that there is at least one
  dive operation that isn't party central
  -- and perhaps you can get a couple
  of dives in Bonaire as well. 
 Diver's Compass: A two-tank boat dive is $55, while a one-tank
  boat dive is $35. The two-tank dives at Baby Beach are $75 ...
  Contact: (tel: (297)878759 (store) or (297)932822/940155 (cell))
  or www.searuba.com. ... A 10% to 15% discount on dives is available
  with VisitArubaPlus cards, which can be obtained before
  arriving in Aruba for $10 (www.visitaruba.com/plus). This card
  is good for discounts throughout the island. While dive operations
  will pick you up and deliver you to your hotel, Budget and
  National car rentals usually have the best deals, but they also have local competition
  (Don't leave valuables in open view. I saw too many piles of shattered
  glass in parking lots where someone had broken a car window.) ... Great lodging is
  available, from swank high-rise hotels (Hyatt, Radisson, Marriott) to single-story
  inns (Aruba Beach Club, Divi Hotels), all-apartment complexes (La Cabana Hotel),
  and small private hotels and apartments ... Private apartments can be found at
  Montana Park Apartments for $72 per night (www.mpa.nl), or at the Blue Village for
  $93 per night during the low season (www.arubabluevillage.com).
Diver's Compass: A two-tank boat dive is $55, while a one-tank
  boat dive is $35. The two-tank dives at Baby Beach are $75 ...
  Contact: (tel: (297)878759 (store) or (297)932822/940155 (cell))
  or www.searuba.com. ... A 10% to 15% discount on dives is available
  with VisitArubaPlus cards, which can be obtained before
  arriving in Aruba for $10 (www.visitaruba.com/plus). This card
  is good for discounts throughout the island. While dive operations
  will pick you up and deliver you to your hotel, Budget and
  National car rentals usually have the best deals, but they also have local competition
  (Don't leave valuables in open view. I saw too many piles of shattered
  glass in parking lots where someone had broken a car window.) ... Great lodging is
  available, from swank high-rise hotels (Hyatt, Radisson, Marriott) to single-story
  inns (Aruba Beach Club, Divi Hotels), all-apartment complexes (La Cabana Hotel),
  and small private hotels and apartments ... Private apartments can be found at
  Montana Park Apartments for $72 per night (www.mpa.nl), or at the Blue Village for
  $93 per night during the low season (www.arubabluevillage.com).