You mean ...
I'm a man, right?
Haha.
What else would I say?
Since I'm tall, handsome and athletic, I could say any number of things which play on that, such as:
"Right, you must like the short, balding guy with love handles. I know some guys like that; maybe I can hook you up.''
Basically think of the good qualities that you have, assume that you are not her type because she wants someone with those opposite qualities and play on it.
Since as a DJ you have a sense of humor, how about "Ah, you must like serious guys with no sense of humor. Well, a simple three second makeover can turn me into one of those. Watch!" Then wipe a hand over your face, revealing a stern expression.'' Then I'd continue, in a serious voice. "Okay, now what do guys like this talk about? Hmm, cough cough, this is difficult, I wouldn't really know. How about: Life sucks. Rap lyrics are offensive. Oh, what, I can move my neck! I think the stick in my butt is riding too low!"
What do you guys think of these ideas?