First H thing I think of is those random hook-ups at cons can be so much more fun actually screwing the character, instead of just the cosplayer.

but you are right, it makes people able to get even closer to the actual character. Although, it does make the possiblities of crossplaying even more high, because of the lack of embarassment caused by the anomomity (sp?) of the person... *shudders at the thought*