Hmm, would be a long list heheh.
Eyes, a nice pair of eyes, I can get lost in for hours on end, never gets boring.
Lips, the way they move when a woman speaks, the way the lower lip is sometimes bit, not only in obvious moments, but also often while contemplating something.
And the area where the thigh meets the bum (For the non British Isle inhabitants, the Tush, Butt or choiceword). That area draws me magically. When a nicely shaped bum connects with an equally nicely shaped thigh, its just...can't explain it. Hours of fun kissing, caressing...well I usually don't stop there but it's a major turn on.
Ok, so the list was shortened, heh. Can't give everything away in one post