1) What do you use to listen to your music?
I use a universal player for my CD, DVD-A and SACD's and an IPOD when I am having a party and want a good mix.
2) Do you have a portable music player?
An IPOD mini - 4GB
3) If so, what is it, what music format does it accept, and where do you purchase your music?
AAC, MP3. I do buy a few songs from itunes but usually I still buy the CD and rip it to my library.