Very clever post (thanks SLB!), since many of these are not gulls, but terns (the short, black legs and the fine, long beaks are dead givaways!).
So, here are my IDs or educated guesses:
Bird A: Laughing Gull, maybe, but I am bothered by the redish beak (could it be a Heermann’s or a Laughing Gull? Either would be quite rare in Florida)
Bird B: Probably a juvenile Laughing Gull (in transition between 1st and 2nd year)
Bird C: Royal tern
Bird D: Sandwich tern
Bird E: both pics 3 and 4 could be Least Terns, but one looks more “wintry” and the other more “summery,” but I also agree that they could also be two different species, perhaps
Bird F: Common or Arctic Tern?