I use Ultrasone Pro 750 headphones with a Traktor Audio 2 for computer listening. Usually just mp3s. I used to use my headphones all day long when I worked a desk job from home; nowadays they are collecting dust and I hardly seek out new music. I guess it's part of my music listening cycle... I listen to a genre until I get tired of it, then have a null period until some other type of music catches my interest.

I've never been a fan of iPods. I've had several but have never really used them. I will bring them on rare occasions if I'm going off the grid for a while, but in those cases I usually prefer to listen to silence or the normal sounds of the world sans humanity. It's pretty refreshing. Otherwise, I don't really enjoy tuning out during daily stuff.

In my car I just load up a USB stick with all sorts of random stuff and plug it into my car's USB port. Thank god for that thing. If it wasn't a gross exaggeration I'd say it changed my life. No aux cables or satellite radio necessary. I also love (like everyone else, apparently) to listen to music while driving. Screw you Google, I will never get your driverless cars for this reason alone.