Which ringtone are you?

When I changed from a Palm Treo 750 to Ivan the iPhone, I gave some people - the ones I was talking to as I learned how to make ringtones - the opportunity to choose their own. It started me thinking about what noise or song I would choose as my own personal ringtone. I'm still considering it; but I have chosen the default ring tone for the iPhone - "Hello Dolly" - which does make answering the phone interesting since I always want to answer "Hello" as the singing starts. Which ringtone would you choose?