My wife and I have been to TIR a couple of times for a total of three weeks and enjoyed it very much. Since then, I've been to Placencia many times, and my wife goes with me every other time. Obviously, we also like Placencia a lot.
All of that was leading up to that imho the diving all over Belize is very similar. The advantage to TIR is that it's an all-inclusive summer camp for adults type place (eat, sleep, dive and repeat) and the dive sites are literally just minutes away. And while the BH isn't everyone's idea of a good time, I love that dive as well as the ones that follow on that day. The advantage to Placencia as well as Hopkins is that you're on the mainland so if you're into any sort of land-based activities these two places work better.
We haven't stayed on AC but from what I've read here the diving is similar to Placencia. Some complain but most seem to enjoy it.
As far as pelagics, there won't be a lot. Turtles, rays, nurse sharks and dolphins. We did see some Short Fin Pilot Whales once but were told that was unusual and my experience since bears that out.
I haven't stayed at Hamanasi but I did have lunch there once and took a tour of the property and dive shop. First class operation. Both Hopkins and Placencia have grown tremendously in the last few years as Canadians are retiring there in droves. It's easier for them to retire to Belize as part of the Commonwealth as opposed to trying to move to Florida. Still, both villages will have a much more Belizean "feel" than AC. Some people prefer that but others not so much.