That's easy. Jarheads without a doubt. I was amazed at the attention I would get when I went to the mall (in uniform) with my recruiter. I don't think it's just the uniform that the ladies like, I think it's the body inside the uniform and how we wear them. With all that being said, I think all of us that wear a uniform are some cool cats.
Also, there are few things sexier than a female in a flight suit or service charlies.