Usually - not that this question comes up THAT often, but, you know, it comes up - I'll just mutter something like "Oh... I dunno... all different things" or "durrrrr, you know... Adele? And, uh, I've really been into the new... Bon Iver album?"
I'm not really sure why it's music that gets me all clammy and self-conscious. I've got no problem telling people I still watch "Gossip Girl" or that I saw "What's My Number?" on my birthday (though I did shamefully refer to it as "that Anna Faris movie" in one e-mail... as if it would somehow make it less "reprehensible" if I couldn't remember the actual title? I don't know what that was about). Anyway, yeah, for some reason music just brings out this weird insecurity complex in me (and, I think, in other people, too?). There is nothing that freezes me up like being asked to "control the radio" in a car of people I don't know that well. It doesn't matter what song comes on the station, I change it after a few seconds for fear of condoning a song I shouldn't be condoning.
But ever since the advent of this new, annoying Spotify synchronization thing on Facebook - which means I now see what like 25% of my friends are listening to at all times - I've started to realize most people's music tastes are not as "cool" as I'd always imagined them to be. I suppose it's been sort of comforting in a way? Even the most self-avowed music snob people - sure, they mostly have their Werewolf Sacrifice or M&@42 going on - but they also sneak in a LMFAO or Rihanna track every now and then! It's not that I thought that these people never listened to so-called guilty pleasure tracks on occasion, but having concrete proof of it streaming through my news feed every day has been oddly satisfying.
Of course, this doesn't mean I'll be sharing my music anytime soon. And when some dude I'm talking to at a party dismissively says something like "Ugh, this, really?" when "Teenage Dream" comes on, I'm sure I'll continue to perform one of those foot-shuffle/look-at-the-
ground sequences instead of responding, "Oh, this song? It's actually the fifth-most played in my iTunes."