I voted for calves, but that's just because nice calves turn me on. Also, I've seen plenty of nice legs with pathetic calves, but I've never seen nice calves with shitty legs, so it goes to follow that if a girl has nice calves then she'll have nice legs along with them. Really, though, it's important to have nice everything. I will say that the worst thing, in my opinion, on a girl is fat arms. I can deal with a fat ass and even a little bit of a belly, but I absolutely can't stand fat arms.