I thought of another one I'd like to be: one of those huge crows/ravens that mostly walk around in fields or harrass other birds all day. I could get really high in the sky and then circle over dead stuff...and eat it. I could soar on wind-streams and stuff. Plus, I'd be very black and shiny.

Ohhhhh, and I could swoop down on people and scream "KAAWWW!!!" and scare the shit out of them when they're leaving buildings. It'd probably be kinda funny to poop on cars and statues too.