Girls like men have different ideas if what would be perfect for them. I think everyone wants someone who is pleasing to the eye i.e. handsome, muscular, well dressed. In a female, pretty, well proportioned, and attractive.
It all depends on the personality. One of my ex's was really buff but really REALLY controlling, one was a larger guy and he cheated on me the whole time we were together, and one was skinny but a huge Richard. It all depends on the personality.
Personally, a man who is himself and is honest, faithful, easy to be around, and can make me smile is all that truly matters to me. Some women are shallow, but they're not the ones who are worth your time. Be YOU and someone deserving will be thankful for it ps. do show some emotion if that's who you are... some women like it