I've had a lot of hard rough anal before, and it can be very good with only minor post-sex regret in terms of injury. I think the key is first- to be really turned on. That is most important. Obviously many things seem hot when you're aroused that might not seem so cool if you're not in the mood. Additionally, work your way up to it. Practice having anal for a few days to stretch you out. Get so he can be inside you with a good rhythm without too much pain. Also- don't be afraid to hurt for a bit and try to ride it out. I've had some really good orgasms that started out as extremely painful anal rapage. See if you can get through some of it and it might turn out well.

Practice practice! :-)