Well, I've got my AOW, and I've got 60 dives right now. I do have deep dives -- in fact I just got back from diving the Oriskany wreck off Pensacola, where I did my dives at about 105 fsw on Nitrox. (I understand there IS no Nitrox on Caye Caulker...oh well!). I live in SoCal, so most of my dives are beach dives in the c-c-c-cold waters here, which can be quite challenging when the surf's up. I've also been diving in French Polynesia and the Marquesas, where I did pass/drift dives, wall dives, and deep blue ascents. I've done a little research so far on the dives I'll be doing, and I haven't seen anything that concerns me yet.
I've read varying things about the Blue Hole. Many people say that it's really no big deal, and the other two dives that you do near there are the only real reason to do that trip. But others have raved about it. It seems to be a love-it-or-hate-it thing! I haven't done anything like it, so I'm sure I'll enjoy it. It'll certainly be different! I've read that there's really little marine life to see there, but I'll be seeing enough marine life on my other dives and the natural features sound fascinating enough to me, so I'm looking forward to it.