It's touch to pick a favorite corner of Heaven. I mean we work all year long, take a week or two off to go play, and how can you not love every inch of the Cozumel dive sites?
I sit in a small office, with no windows. Alone. All Day. All year. And for 10 days a year I get to lay by the pool, dive some of the best spots in the world, and get some sun.
Palancar is great. Chaankanaab(sp?) is great. Heck, the pool is great for that matter.
I dive Monterey, Ca. and vis is about 6-20 feet on great days, in a 7 mil wet suit or my dry suit. So the thought of diving in a pair of shorts and no wet suit thrills me. I have a favorite I suppose - Cozumel.
Really not much of an answer to the question i suppose....