I also download a lot of music but it is songs I already have on CD's to listen to while on the pc, odd tracks that are blasts from the past that you can't get any longer and odd tracks off an album that I begrudge paying the money when I only like one track off it! Other than than that I still buy CD's if I like the album or artist enough, because, if anything ever happened to my hard drive what better way to have it backed up than on a bought CD.
I also use limewire and they've yet to let me down, even on some very weird songs I've wanted like Naughty Naughty by Joy Sarney..........
don't ask lol!!!