As divers progress, some of them hop from one destination to another in search of very specific experiences. Night dive, check. Manta rays, check. Giant sponges, check. Others are simply looking for a way to spend a few wonderful days on vacation and see a destination from a different angle.
Budget is usually a big factor in selecting a destination.
Different destinations require different investments, usually not predicated on the diving alone. This generally covers a boat ride to the dive site, two tanks of air, some snacks, and the support of staff on board and dive guides underwater. Prices usually vary only for special services such as especially fast boats, rare animal encounters, small private groups, or a catered lunch on a deserted island. Where budget really becomes an issue is beyond the diving, starting with the flight and hotel or live-aboard and ending with meals and souvenirs. For some destinations, the plane ticket is the big item, with accommodation prices reflecting a very competitive market.