I know this is NEVER going to get taken seriously, but I do highly suggest classical music or opera. I know it sounds like an odd suggestion, but trust me on this one. It particularly has effect when working. Playing games...sometimes, but not often.
One of the best pleasures in my life is easing back to write something with my big headphones on and getting lost in my own world as the notes of Le Nozze di Figaro or La Traviata (just 2 examples) wash over me. I don't have a CLUE what's going on in the damn things, but the emotion stays there and really inspires me in whatever I'm doing.
Plus, gunning people down while listening to Beethoven's 9th Symphony NEVER gets old.