Just out of those 4? I would like to add some:
5. shoulders
6. feet
7. hips
8. hair
9. joints (knees, elbows)
10. hands
11. pussy, a.k.a. vagina
12. ears (or are they part of a face?)
13. neck
14. BRAAAAAAINS
(I'm surprised at the amount myself)
It really depends what i'm in the mood for. It changes pretty often.
If I had to choose, I'd say neck, shoulders, titties, pussy, legs, with a trend towards pussy. Runner-ups are neck and legs. That's now, now it changed to joints, to hands--- damnit, that's silly. I want the whole pack. Imagine fapping to just a neck with legs.... damn, that's hot.