As a chick here is MY opinion. **This is mostly joking for the real opinion see below.
Sailor/Sumariner: ex-boyfriend is one of those. -- I was attracted; I will not be again.
Commando/Marine/Etc: attractive yes. however higher brain functions are required...
Intel/Desk Jockeys: too much higher brain power. (I'm a picky b**** what can I say?)
Infantry: same problem as the Marines
Pilots: smart, fit, and they fly. now if only the ego was a little smaller...
**Honestly speaking it really doesn't matter what your AFSC/MOS/Rating is. The uniform itself gets lots of bonus points!

What I'm looking for in a guy is one who is mature, smart, and in shape but not crazy about it. Not to mention the obvious chemistry factor.