Nuanced, Ambivalent or Guarded

I don't like bumper stickers. The idea of finding something I feel that strongly about to proclaim via my bumper is overwhelming. What if I change my mind? Besides that, most bumper stickers are not smart or witty or nice looking. And to be completely honest, I don't want people talking about me behind my bumper (so to speak).

But I would gladly post one of these bumper stickers on my car. Especially THIS one.