Alright, alright, let's compare, shall we? Cause I think this tie between Tidus/Shuyin/Lambchops is close.

Tidus:
Good:
-Is a well developed character with an actually realisitc personality (I mean, come on, what t</>een wouldn't be an annoying cry-baby?)
-He has a pretty neat sword.
-Personally, I think his physical characteristics are actually unique.
Bad:
-Although it's realistic, he can be annoying. (Not like Rikku in X-2, though)
-He plays blitzball, which I can never win at.
-He walks funny.

Shuyin:
Good:
-Has MUCH better clothing than Tidus and certainly looks cooler. Therefore, he is a cool evil dude.
-SLIGHT SPOLIER:With him involved near the beginning of the game with the mystery of, "Is he Tidus?" Kept me up in my seat for the entire time.
-Dude, his voice...is awesome...*drools*
Bad:
-He really doesn't have a developed personality. Bad Square, bad!
-WHY COULDN'T HE BE TIDUS?!?! ;____;
-He's just...cool...

Lambchops:
Good:
-Are nice with a holiday dinner.
-Can taste good with the right sauce.
-Sound funny.
Bad:
-I don't like them plain.
-What does this have to do with Final Fantasy X-2? Oh well...
-CHOCOBOS!