All right. Who's the dumbass?
(Though if you start a "my personal theme song" thread I'll be on you like white on a black person who "has issues.")
I don't have favorites so much as transitory obsessions. (I've been listening to Puffy Amiyumi's Boogie Woogie No. 5 on endless repeat for three days, both stationary and mobile.) Currently, it's Puffy Amiyumi (drop the Amiyumi if searching youtube — they're known solely as "Puffy" in Japan; long story), Chisato Moritaka, Faye Wong, and Ringo Shiina.
Everything else feeds from a 3,000+ song playlist.