Not at all. Perhaps unusual, but there is nothing wrong with it.
I’ve only been with one guy (and married him too!). He’s not fat, but he has what I would call ‘protective covering’. He is muscular, but its hidden with a tad bit of weight he can’t lose (and he’s a Marine that runs 5–8 miles a day as well as does other crap too, so its not for lack of trying).
Honestly, I like it. There really isn’t a lot of ‘chubbiness,’ but there is a little. It feels soooo much better to hug him than I’d imagine it would to hug a skinny/hot/whatever dude. He’s my 6’ teddy bear! :P
I’ve never really been turned on by appearances though (from either gender). I consider someone hot or sexy when they make me feel that way, and my husband is the only one who’s had the chance to. :) I suppose you could say I don’t really have a type.