Dating wise, I don't think I could date a feminine guy. I mean, with the few feminine guys I have talked to in my life, I had nothing in common with them except the fact that I like to take time in creating my outfits. Yeah I'll admit that I have fun coming up with new wardrobe ideas but as far as that goes, I really don't have anything in common with them to base a relationship on.
However, I also don't think I could date the most masculine guy in the world neither. Guys who try so hard to "act straight" to fit in with normal society are just as much a turn off to me as the overly stereotypical flamboyant acting guys. I think a balance of both masc and fem is the perfect balance to me. Like they like to get down and dirty but aren't afraid to show that they have feelings as well. That's the perfect kind of guy to me.
But yeah, I think that you should be yourself. If you do have fem qualities and aren't afraid to show them, then continuing being the guy you are. Because even if you meet a guy who doesn't like who you are, there will be another guy who will.