Axel Hawk is the greatest SNK boxer of all time, because he appears in the greatest SNK game of all time: Fatal Fury Special. "BUST YOU UP!!" But I have to say my favorite boxer to play as would be Vanessa, who over the past few months or so, has overtaken Rick. They play simillarly in ways (to varying degrees depending on which version of Vanessa), but differently enough to warrant being seperate characters. If anyone remembers Franco's ending in RB2 (where a FF3 style human-sized Franco emerges from a cartoony, overly pumped up RB2 style Franco shell), I could picture a similar ending for Rick, where his back unzips, and out steps Vanessa.
I wouldn't mind seeing more boxers in KOF, but I don't necessarily know if I'd want them all on the same team. Spread them out a little. And no need to include Michael (who's a prototype for Axel), or Mickey. Rick would be a cool substitute for Vanessa, if you changed his lame design, but they don't really need to be both in the same game. I'd like to see Heavy D again also, maybe with a couple new teammates.
Not that any of that will happen, but it beats waiting for a '2003 members post here' thread.