For me it's really important that the guy is considerate, and that he has a great sense of humor. I like guys that are a confident, but not overly so, and that have a healthy desire to please me, it makes me want to please them even more.
Also, a good communicator is key, and someone who won't be offended, and may actually be more turned on, if I say can you try this instead of that. I want to learn how my lover works, and I want him to desire to learn what I like.