I've always like Janine Janine Lindemulder...well, except for the fact that she only does girls. Oh wait, there's nothing wrong with that, hehe. I don't think she's in the industry anymore, but I always found her performances enjoyable to watch.
As runners up, I'd have to include favorites like Asia Carrera, Chasey Lain, and Lori Michaels. I'd also include Sydnee Steele in there, as I'd really like to take a bite into her ass .