I don't find girls that are "fat-fat" attractive, but somewhat chubby is great. If I can see ribs at all on a girl, I feel there is something wrong and don't find such girls attractive.
To elaborate, since this is more of a superficial kind of thread, I don't think I could date a girl that didn't have a nice or better looking face. Aside from the face, I'm more attracted to the rear of a girl than the chest area. I'll admit that I look at my fair share of pictures every once and awhile, but very rarely do skinny chicks have good looking asses, at least with the look I find perfect.
Now personality wise, I think for proper compatibility I would need a girl that is confident, considering that I have a more than moderate case of social anxiety disorder, I need somebody that will pull me along and give me some of the confidence I lack. Though, she can't be extremely controlling, I know I'm not compatible with that. I also believe that a girl must be smart and have a good sense of humor.
Okay, done, though it sounds like I made an entry onto some weird dating site.