2784 songs in iTunes, with a total playtime of 8,8 days. I like stuff like Pink Floyd, Santana and symphonic metal so many pieces are rather longer than your average radio song.
I must say I do not own all these song, I've simply ripped lots of CDs my family and friends own to my PC too. What I own I also have a hard copy of (mostly CD, few vinyls I've downloaded the contents of) too though and I do listen to those quite often, mostly because I don't have access to my media library from my living room YET.