To me, there's nothing more attractive than a woman who knows what she loves and isn't afraid or ashamed to show people how much she loves it. (Yes, even Twilight/Fifty Shades, but I reserve the right to tease!)
I'm much the same with my hobbies and relationships. Photography, writing, traveling, and of course my friends and family. I try not to take half-measures; if I enjoy something, I go in full tilt, and I'd like to be with someone who shares that perspective, even if the things she loves are different from the things that I love.
Hopefully, that kind of woman isn't hard to find, because, as a wise person once said (I forget who; I think John Green paraphrased it), "Everyone's a nerd about something."