Being a sellout is usually a bad idea, and changing your tastes about popular trends, i.e. jumping on the bandwagon, is not something I find attractive. I consider myself someone who takes ideals seriously, with clear likes and dislikes.
That being said, there is something to be said for being realistic. I used to be a lot less attracted to popular culture at all.. And a lot less concerned with the environment. How much is due to the changing state of the world and globalization and how much to my coming of age it's hard to say.
I wonder how much my realistic side (which is all often seeming to knowingly say, "You should treat yourself") is at fault for my feeling of coming short of my perfectionist goal, and how much of it is I should have waited, and the moment will present itself, like it sometimes does..