For me, the best characters are the ones that feel fully formed inside and out, so I try to have a very clear vision of exactly what they would wear, top to bottom, who they are, what their backstory is, what their family situation is, who are their friends, just creating as much of a three-dimensional character [as possible]. Because I think you could do a very broad character, but as long as there's some emotional truth to them you can get away with really crazy things.