I buy a lot of (physical medium) music, so I don't need to pay for a music service and I have a collection of music on my hard drive that I want to listen to. B

I buy a lot of (physical medium) music, so I don't need to pay for a music service and I have a collection of music on my hard drive that I want to listen to. Because of this, I use Google Music a lot, especially considering they have a good mobile app for my phone. Grooveshark has become a distant second since I got my Google Music invite, and I used Last.fm before I found out about Grooveshark.