TiPb Asks: What's your iPhone ringtone?

Marimba, the default iPhone ringtone, is so 2007 -- so we're curious what you're using today? Have you stuck with the built-in tones or have you gone with something custom? Do you just use one ring tone for everybody or have you personalized your favorite contacts?

If so, do you like songs with lyrics or do you prefer instrumentals? Do you keep things musical or do you sometimes go with soundboard clips for that comedic effect? Video game themes, movie themes, rock, hip hop, special effect sounds, celebrity tag lines, sports jingles?

Let us know what you're using, and for those of us looking for some cool new ringtones, what would you recommend?