Nathan Bransford - The Forums

I know it's not for a while, but my girlfriend and I will be going to DragonCon this year, and we definitely want to dress up somehow. Neither of us has any idea what to do, and I raised some weird suggestions that got shouted down as not being from the "right kind" of movies. Is that really a big deal? I figure, hey, these things have gotten pretty wide in scope; would it really be that weird to go in a costume of a character from a non-sci-fi/fantasy movie/tv show? "The Big Lebowski", for one, or maybe "Flight of the Conchords"? I don't think so, but I thought I'd ask you guys' opinion; this is one of the only forums I know of that wouldn't get a hundred responses along the lines of "nah bro thats dum you shud go as yorimoto-chan from Electric Romeo Tori its the besst anime ever lol".