For all my personal dislike of slogan-shirts, it might be a little bit bizarre to say this, but I think I'd like your design even better if it would sport the imperative "Go figure!"
A nice design as is, though, I'd certainly wear it (despite... see first sentence!)
About my design
If you didn't go to art school, or never came across this concept, see: http://en.wikipedia.org/wiki/Figure-ground_%28perception%29
Could be done in a variety of colours. I also like the idea of the negative space (read: ground) in glow-in-the-dark ink.