Heh, my best friend's married and has a glass case filled with comic book/RE action figures, and a giant (we're talking, 6' tall) cardboard cutout from Matrix Reloaded right in the center of his den. Now I personally don't have any posters or action figures on display aside from a framed Devil Summoner lithograph autographed by Kaneko (and even then, it's tucked away), but as long as you find a girl who's cool with it, I don't think it's that big a deal.