My gym used to have a playlist with a ton of ballads and such, really terrible music to lift to. Recently they compiled a playlist from what the regulars wanted, which is (off the top of my head) Motley Crue, Thin Lizzy, Judas Priest (nothing gets that lift going like the intro to Painkiller), Metallica and the likes. I'm really content
I've been slacking a bit the last couple of weeks, but I'm ready for the new challenge!