Great thread! Lots of interesting answers.
My purchasing habits and listening habits vary by format.
I buy individual SACDs as my interests take me and always listen from beginning to end for at least several times. I buy newly recorded music
only, not reissues in SACD format.
I buy CDs by the box only (MLP, RCA LS, Seon,DG etc). as they are an absolute steal and audit them at my leisure. They are usually vintage (50's-80's) recordings which I have already heard and feel no pressure to get through them all.
I buy LPs at charity shops and flea markets and they are always opportunistic purchases as I have no idea what's available until I get there. I listen to them as I would SACDs if only to determine how much
"cleaning" they will need to be part of the collection.
I buy open reel tapes recorded at 7 1/2 IPS because I love the sound of well recorded reels and listen to them frequently. Unfortunately these tapes are rare in the UK and I treasure all of them ( I have less than 40).
I post only what I consider worth listening to or something by a major artist that I feel is a sub-par performance so other people are aware of it.
I never knowingly post the same recording twice, but I have 10 years of posts in the classical music section, so duplications do happen.
Ray