If I was younger, and didn't want to participate in the "social norms" game...If i was in my twenties / 30s, chances are i'd very much like to have blue hair
I would want to style myself after Adam Lambert.
Oh, the chicks I would have gotten looking like that!
Hell, even I think that dude is sexy.

Even now, I would like to get some tattoos, but my wife doesn't like tattoos.
And it's not THAT important to me, so I opt not to do so.
I could even see certain piercings as being a reasonable part of my ensemble.
But I'd still be pretty conservative when it comes to piercings.