[dualthro]

> whatever the business, the part that's fun to me is getting to play with all the little knobs and levers of and seeing whether my choices yielded good results.

I am the exact same way, and yet I struggle to articulate this. People say to me "why would you be excited to own a carwash?" (example biz, I own none right now) and my answer is basically what you said -- its this kind of huge, real world, testing environment/challenge. How can we increase efficiency here? How would modifying the soap mixture affect the cleanliness of the cars? So many inputs and outputs to experiment with, I can't think of anything more interesting....