2,250 songs, 519 albums, 279 artists, 13.8 GB. Bear in mind that my laptop completely weirded out and locked me out of my old computer account, so I had to start over. This is all the stuff I could find on memory sticks/salvage from my iTunes account/get from CDs
I recently transferred all of my music from my parents' computer to my macbook and a good chunk of my music didn't transfer over but at the moment I have:
948 songs, 292 albums, 169 artists, totaling 2.3 days and 5.85 gb.
I'm extremely picky about my music. I have some songs that date back to middle school and I still like and prefer them over new music. That and I end up erasing the songs I don't listen to constantly.
It's like 100GB for me...so far. I still have around 80 CDs to import. Well, that's on my Ipod anyway. My laptop can't hold all my music and still manage to work properly.