I'm going to be honest and say that I personally don't. I lead an active lifestyle and I need someone who can keep up with me. Generally speaking, that doesn't mean a fatter guy. Also, I am 5'4, 112 lbs so if he's too big, he'll squish me without trying to and that'd be bad. I don't look at a fatter guy and automatically think, "Ew no." I think, "he probably wouldn't be interested in my lifestyle."
I won't count him as a loss if he's not ripped, but there's a degree of weight that simply would not match my lifestyle, you know?
If he's heavier naturally but likes to run, bike, ride horses, hike, camp, fish, and mountain climb, then I'd be all over that. But if he's heavier and likes to sit on the couch and eat chips, I'd probably avoid him. Make sense?