Do you like to keep musical scores about? I don't have a huge library of sheet music, largely because I can't afford to have everything I'd like, but I make of point of collecting scores of the music that I value most and that's still several hundred items and continuously growing, in spite of transcontinental and transatlantic moves and a habit of giving things away.
My impression — and I may well be wrong about this — is that a score collecting habit has become something of an antiquated pastime. Certainly, more people are satisfied with just having recordings, but for me, (excluding, of course, those pieces made especially for recorded media) a score can still have a potential multiplicity of interpretations — readings, imaginings, hearings — that a recording can all too often cancel out. (Which is okay in a few cases; I don't need the score for Beethoven's Seventh, because I honestly don't think that there's more to it than in my favorite Kleiber recording...) Also, I think that collecting scores — whether bought, gifted, copied, or lifted, and whether an orchestral or chamber score to study or an album of piano pieces to play for my own pleasure — is one important way of being a good citizen in the community of musicians.
One very good thing about my blogging experience has been that it has led to some intense exchange of scores with colleagues, many of whom I only know online. Those scores, whether delivered by post or as email attachments, are among the most substantial pieces of mail I've ever received, damn close to love letters, I'd say.