My favourite is Franco Roccaforte (sometimes credited as Teo or Theo). Very sexy body and dick. Beautiful face as well - especially the goatee. Sexy smile. He seems to have a lot of fun and really gets into his scenes. He seems quite kinky as well - I've only ever seen him in straight porn but I get the impression he'd be into ANYTHING with ANYONE!
Mr Marcus - already mentioned by anal_lightbulb but I'll add my two cents. I think Marcus is HOT! That muscular body, the tattoos, and of course, the dick! I love that thick piece of black meat. I also think he's got a beautiful face. When he smiles, his eyes light up. I love his goatee - I'd love to feel it tickling the back of my neck!
Omar Williams - already mentioned by Princess Tasha but I'll add my two cents. Very sexy and seems quite friendly. His scenes are always a bit cheeky, he has fun and doesn't take himself too seriously. He doesn't seem to have the 'porn-star-with-a-big-dick' ego some other male porn stars have.