I often get told that my music collection is great by random guests and people. For me music discovery is an active act, so every other month I spend an afternoon to find new things read up on certain scenes etc. E.g. I stumble uppon Iranian 60s rock and roll, find a few artists that are more unique in aound and the way they do "rock", I download things, tag them, sort them, create playlists and store them away.

This way when I play the music (e.g. at a dinner with friends) not only do I know what it is going to be, but I can also tell them a little story about it.