Well I deffinitly am very attracted to thick girls, I actually find any weight on any girl attractive that can carry their weight. It would have been better if you put up an example pic of what you mean by 'thick' though, a lot of people seem to have different definitions of what they consider thick. Iv heard people refer to my taste in women as being a chubby chaser lol. Personally I don't consider my taste to be girls who are that big.
I know you said guys only, but think about it this way: The first responses that you'll probably get if you ask a guy what their favorite features on girls are, will be butt and boobs. Thicker girls have bigger butts and bigger boobs.
All of my thick friends have boyfriends. None of the skinny ones do. (Including me...) It's obvious most guys prefer thick, or curvy girls rather than skinny. Whereas, a few years ago I remember thin being in... Now it's different.
I'm actually jealous.. My best friend is 5'5, 150 and she has the best body ever. Her weight is perfectly distributed and she has the best curves. My guy friends told my other friend they'd choose her over this other girl (a thinner girl) anyday.
Kinda makes me want to gain weight.. then I say f*** it, I'm not changing for anyone! haha.