Kings Spring in Crystal River is my favorite simply because of the wildlife being more like a reef dive than cavern (manatee, tarpon, giant schools of snapper, and mullet). I'm happy that Paradise Springs is getting some well deserved praise, it's a very close second for me! Blue Grotto is pretty boring in my book, but at least it's deep. Alexander Springs was great when I got OW certified, but after seeing what real diving is about and going back you realise how boring it is. Devils Den is interesting(at least to me), but still a little pricey. I'll be going to Peacock for cavern cert. next weekend, and hope to have some good diving hopefully... My DI(Jim - Underwater Adventures) is fantastic and kind of a character, so it should be a good time.