What kinda stuff do you listen to while performing a kill?
I'm more of a Classic Rock kinda guy, myself.
AC/DC, The Ramones, Led Zeppelin, those kinda guys.
Weird Al Yankovic is good too.
Can't go wrong with a bit of Iron Maiden.
But depending on my mood, I might speed things up with a bit of DragonForce.
And Nine Inch Nails often works... either music or actual nails come to think of it...
I honestly have only heard ONE good song by Dragonforce; Through the Fire and Flames. Operation Ground and Pound sounds almost exactly the same.
I mean, those guys can shred, don't get me wrong, but seriously, they need to be more original.
Depends on what I'm trying to accomplish.
When I'm playing online PVP games, usually a good heap of hard rock/industrial tech/metal/rave/euro-tech will do the trick. Really helps me concentrate, aim better, etc.
In my spare time I listen to a good heap of non-repetitive symphonic electronica trance techno. Other than that, it's They Might Be Giants, MIKA, OK Go, Barenaked Ladies, and a really weird local a cappella group called Moosebutter. Oh, and really good video game remixes/OSTs.