John Tucker Didn't Change

I think he should have ended up with Kate.
They both really liked each other.
His bro was more like a friend to Kate.
There wasn't much chemistry between them.
Kate confesses to him, and John goes back to being a douche.
He is still engaging in meaningless relationships with multiple partners, the girls just know he isn't exclusive.
If John truly grew up, he would have stayed with Kate or ended up in an exclusive relationship with someone else.
Kate evolved in the movie.
I think John would have liked Kate because she improved herself.
She started to become the perfect girl for John.
She wasn't the same person by the end of the movie.
If he truly fell in love with her like the movie made you believe, he would have worked things out with Kate after she confessed to him.
He was no angel as well, and Kate started to fall for him as well, thus the relationship wasn't a total game.
After the truth, he went back to being a pig, the girls just knew he isn't exclusive.
He was still a public john. :) LOL
Him evolving in the movie would have been a better ending.
His bro could have ended up with one of the jilted girls.