My database tells me that my CD collection stands at 2225.

I stream everything now so no idea.

CD collection, about 200 or so.
FLAC files on my computer, a few hundred of them.
1 SACD.
Cassette tapes, about 200 or so.

I don't know the exact number but over 1,200 albums.

My collection should have been at least 50% more but, every so often, I insist on shedding what I don't value or listen to regularly.

I only collect digital formats. I do have some old vinyl (under 20) but I've kept them strictly as souvenirs from my youth.

CD albums: 270
MiniDisc albums: 300
MP3 albums: 680

Singles and EPs: 120 (roughly 25% on CD, the rest on MP3)

Size of MP3 collection (not including CD back-ups and pending stuff): 87 GB (mostly at 320 kbps)