I have 60k plus and believe it or not, I only have music that I like.
All of them are ripped at atleast 128 and I only have full albums. Artist, track, album data absolutely complete.
Have also found other people that says they have so much but then when you start going through their collection you find a lot of thumb, ini, gif, albumart and other crap in there.
To really enjoy such a collection one needs a tool such as
www.musicip.com which offers a 'mood' matchmaker (actually works for me) and your genre's needs to be setup properly. My complete collection is categorized in only 23 genre's. Capitals and all correct place (lol)
ps(anyway, here's to my first post)