Eyes, lips, belly and back.
Eyes because the way someone looks at you can tell alot about them, if they'll be stern on you, soft and tender, etc =3
Lips, a smile or a frown, velvety soft to kiss, and use elsewhere hehe
Belly, sounds weird, but super abs doesn't do it for me. I like someone with at least the slightest of pudge, so when snuggling, and laying head on their belly, its comfortable and soft. ^.^ (i'm a dork)
Back, and this is both on men and women, to watch the back as it moves from different tensions and position, the muscles ripple, just the slightest sight of a vertebrae, shoulder blades shifting....mmmph...wh at were we talking about?... >.>;