I guess my mood determines what I have playing through my speakers/headphones. When I need to concentrate or do paperwork, I usually listen to classic music. There is just something about a piano that really relaxes my mind.
When I am browsing or shopping online, I am listening to something with a sick beat. When am chatting, I seem to be listening to a lot more classic rock n roll and I think that is because the chatters are posting/linking more classic rock titles. I enjoy listening to the same song as a bunch of strangers online. It connects us to together at that moment and makes the moment seem more real. It is fun.
When I am alone in my car, I usually listen to my cd's. I guess I am kinda old fashion about that too. I still buy my music from a real store and get a real disc. I have downloaded songs but I still like to purchase the disc.
My favorite part of buying the whole "album" is the drive home. I crank up the volume and listen for the chorus of the new songs before I move to the next one. I have a chance to hear a little bit of every song so that I can complete the new disc before I get home. I guess that is one of my guilty pleasures in life...I hope you find something that moves you...