Both my husband and I enjoy biting/being bit. Light nibbling is great for kissing/foreplay, but we enjoy harder biting as well - especially when one of us is close to climax.
I like to be choked from time to time (this is something I have only done with my husband - whom I feel 110% comfortable with).
We have only had the chance for semi-public sex a few times, but really enjoyed it. We weren't right out in the open of a super public place. We've had sex in the car, outside of the car/on the car in the driveway, outside of the venue for a friend's wedding reception, just on the other side of a fence of a public place.
I love to be spanked. I don't really care for being the one doing the spanking, though.
We both enjoy being restrained. I really get off on a rape fantasy, as well.