It really depends on my mood. If I'm in the serious 'tech OG H4Ck3R' mood. I'll listen to a lot of older edm or trance. Recently my heart is with Boys Noize and Hudson Mohawke (yes I did find him thanks to Watch Dogs... I'm not going to try and play the hipster role).
If I'm calm and doing some casual work -- sys admin, *nix ricing, tinkering with personal projects -- I go for old Japanese jazz club... Ryo Fukui to be specific.