Like most of us here, it depends largely on my mood as to whether or not I listen to the subtle sounds of Nature or a bit of music.
Jarre, Tangerine Dream and Kraftwerk have already been mentioned but I also like Gong, The Orb (very much), Mike Oldfield and the Ozric Tentacles.
Being a bit of an old rocker in his early 50's, I like listening to Hawkwind while viewing ( I am the centre of this Universe, the wind of time is blowing through me, it's all moving relative to me, it's all a figment of my mind. Cue Lemmy on bass.)
Also like Nine Inch Nails and Tool as well.
If I'm in a classical mood, then it will be Tschaikovsky (especially the Violin Concerto) or Beethoven.
Tea Party, Alan Parsons, Donovan, John Butler Trio and Jean Luc Ponty all work well too.
Or a bit of early jazz with Billie Holiday, Teddy Wilson and the Count Basie band.
If I cant make my mind up, I just select "Random" on Media Player and surprise myself.
Having no neighbours closer then half a K away means that I can surprise myself quite loudly too.
