No Personality

My friends and I play a game where we try to correlate my three roommates and I with a pre-existing group of four (such as the Teenage Mutant Ninja Turtles, the Beatles, or the Ghost Busters). Whenever we play this game my friends have trouble placing me. I usually end up being the last guy left over; whichever person does not fit any of the other roommates. The other day I realized why this was so hard for my friends to place me: I have no personality.