There are characters that kids like, that most adults find annoying as hell (Mater from Cars). There is someone from a comedy that I have tried desperately to like and still don't (I dont blame nor dislike the actor its the character). I know a lot of people like this movie, and consider it their favorite character. I wish I felt the same way, but I cant stand this movie, I'd say it was okay except for this character who everyone but me seems to think is funny.
I was 14 when I saw this movie, I was so excited to watch a movie that my parents would disapprove of, but this movie failed for me because I almost instantly hated the character of Stifler (Kevin is a close second). The instant they were onscreen (even Shia LaBeouf couldnt pull that off).
If you like this movie, fine, but I watched this movie 3 or 4 times to get it, and it only gets worse each time, mostly for these characters (I know some people like the character of Stifler, so if you do don't take my negativity to heart, I cannot stand him).
P.S. Thank you Eugene Levy for being the only funny thing in this movie.