I don't think Tidus is the most annoying FF character (Seymour and Kefka are more annoying than he is, IMHO), but so far, I think he's the most annoying FF main character. He's pretty much a whiny damsel-in-distress for the early parts of the game. He maybe gets better later, but I still don't really like his character, and his voice isn't much better, either. He didn't bother me in FFX-2, though, probably because he didn't have much to do in the game, and when he did, he didn't talk much. :p As for Vaan, I don't have anything against that guy.