Well, I can strike one thing off the list.
That's right, I got my nose pierced! On my birthday. I wanted to do this when I was 20, but then I chickened out and convinced myself I didn't have the right nose for it. Lately, I started wanting it again, and now that I'm 40, it no longer matters whether my nose is "right" or not. That's the beauty of being 40 - you get a little more comfortable with who you are and a little less concerned about fitting other people's expectation of you.
I guess you could call it a mid-life crisis. At least it's cheaper than a fast car, and less disruptive (not to mention stupid) than an affair. :-)