I only play Very much DotA and Counter-Strike.
At dota i play with music always! At counter-strike you cant do that always because you need to hear the sound :D I play with music only on publics and respawns ;ppP And in games but to be mix's or 2v2's without prizes , for warmup more :D

i listen to music when making movies for counter-strike .. but thats about it you cant really scrim with music on or you will die badly lol :D