I prefer one that accepts paypal. So far, I have only found Napster that accepts PP and they are a bit expensive compared to the others. All others want a CC and want me to deposit cash up front. I don't mind having it sit in there account but I like to post my CC info on as few sites as possible.
So, if you are a downloader of legitimate MP3, what site do you use?
The first song I downloaded from Napster has skips and weird noises all the way through so I will see how there support is pretty early.