I'd say Yoshimori from Kekkaishi,we always make a fool of ourselves.(Especially infront of girls)And we are always worried on what someone thinks of us.
I would have to say a mix between Hinata from Naruto and Choji from Naruto. I used to be really really shy but luckly I have since gotten out of that, now I get angry whenever someone calls me fat. Technically I don't think that is a good thing. xD