Thanks for your time and advice!
Most people I talk to about it have the idea that it must be very difficult to focus, but I don't find it difficult to focus at all, and usually it makes work more pleasant, making productivity more sustainable. Sometimes it also directly helps in my work...
One rule that works best for me is that most of what's on screen has to be stuff I've seen before, or am only a little bit interested in. What about you?
However what does seem to work is no lyric music with a rhythm that's close to your own heart rate.
I listen to a genre of music someone hacked together thats seem to making gains: epic music. Popular artists I like are Two Steps from Hell and Audio Machine.
I code but it seems science agrees if you find non intrusive music that you don't need to interpret but simply "groove" subconsciously is your best bet.
Another genre I like; Baroque, chamber music ie Bach Handel