Instrumental music seems very popular with those who listen while working. Lyrics are noticeably distracting for me, unless I tune out the music altogether, but with instrumentals I can sort of work to a "rhythm" it feels like. So this was kind of intuitive knowledge, already, at least for me.

Because of this, I find myself listening to a lot of Jungle and DnB, jazz, fusion, and the occasional 30 minute Phish jam.