Music is an integral part of my life; without it I would almost certainly go mad. Even when I'm not actively listening to music, I'm still listening to music - there is a bewildering catalog of possible options for my brain to start playing in the background; I have a real knack for remembering tunes, which I suppose comes with being a musician (classically trained pianist, vocalist).
When it comes to interactions with others regarding music, there I take on my character of the "musical evangelist", proclaiming the good word about that which is wonderful far and wide (or more accurately, to anyone who reads the reviews I write about various obscure albums, or has some other interaction with me wherein the topic of music comes up in some way (no matter how tenuous the connection might be)).