Not quite. If I wasn't in a realationship I wouldn't go out looking for either one or the other, it's pretty much up to chance as to who I meet and take a fancy to. As I don't really go out looking though that has generally meant that I've dated far more women.
I say not quite though, because I've been in a same sex relationship for the last two years I would tend to think that I'm more same sex oriented as time goes on. *self observation*