Upon reading this, I wanted one. With inscriptions reminding me of the theoretical and the practical aspects of my craft. Maybe "λf.(λx.f (x x)) (λx.f (x x))" and "10 PRINT "Hello World" 20 GOTO 10".
But is that really the point? To proclaim how clever (I imagine) I am.
I think the ring is meant to be a reminder that I'm part of something bigger, something important. And that I have a responsibility to other engineers, and also to everyone else. That's why I try to make my code comprehensible to the engineer 5 years down the road. That's the "why" of open-source.
So that's why I think the ring is simple. Because individually I'm fallible and often wrong, and I need reminding.