No most guys won't mind, certainly not me. Long as the girl isn't skeleton thin.
It does matter, and I prefer a little weight on a girl or a guy.
Curvy any day.
Duno what all this size zero rubbish is about, losing their hips is just too much to have to come to terms with tbh.
Even if a girl is very slim, there has to be some shape there for her to be attractive. And a girl doesn't have to be very slim (or indeed, slim at all) to be attractive.
Though it usually helps.
What is 'curvy'? How do you define it?