Mostly, I love it rough--getting slammed very lustfully and without reserve definitely makes me a happy camper.
I don't orgasm through sex by itself, so it's not really about that... I think I just love the feeling of being wanted so carnally, at such a basic level--it's very satisfying and flattering, somehow, especially when he finally releases.
If I'm going to orgasm, things have to slow way down, and we take our time... and we do that fairly often, too. And of course, in some funny way, I love it when he wakes up with a hard-on and just climbs on and rides me before I'm really aware of what's happening--that's just a great feeling.
Anytime, any place, sex is good.