Approaching 30 myself and it seems like most decisions I make fall somewhere between ? and !
Nothing profound, just an abstract visual scale for mistakes with little consequences to those with major consequences. I chose colors that remind me of a superhero to represent an anti-hero in this concept.

like the antihero concept

i like, almost 30

I happen to be an enormous douche bag

liking this $

This was only kept up for one day due to mistakenly being submitted to Threadless as a general design. I tried to get 'em to switch immediately after, but it took a while. The shirt was only up for 24 hrs and I didn't even get to vote on it. Anyhow, hope you like it for the contest.