Van Halen's version of "You really got me," since I don't have the original recording by the Kinks. Usually followed by more VH, Pink Floyd, Hinder, ZZ Top, Dobbie Brothers and a few others from the late 70's and 80's. I also like playing the 7+ minute version of "Rock Me" by Great White, but I admit that I do get just a little paranoid when doing so during fuel leak season.
Nothing like a head unit that allows you to use a hidden iPod, flash drive or even portable HD and be able to control it all from the HU or remote.