An impossible question to answer. It would be easier to say who you wouldn't do. For example, I wouldn't fuck Belladonna with George Bush's cock but there aren't too many porn stars I'd say that about.
Going back a bit but in one of her Brat movies (can't remember which one) Jamie Summers looked as good as any porn star ever has. I am so old school.
Not an original thought but Charmane Star is awesome. Except for that little tattoo she has on one of her fingers (I think she does.) I could do without the tattoo on the arm as well. I could do without all tattoos.
Even though she aint one of my top 5, I'm an INSANE ass lover, so I'm going with Katja Kassin.
Runners Up:
1. Jezebelle Bond (Being that i've had the pleasure of talking to this woman online, i'd marry her if given the chance.)
2. Asia Carerra (Ahhh...my first favorite pornstar, now that would be special.)
3. Gauge
4. Briana Banks
5. Heather Hunter