This is a great thread.
Personally, I find the concepts I learned in calculus (not the tedious derivative or integral rules themselves but the concepts) useful in many professions too. The concepts of rate of change at a point, area under a curve, etc. can be applied to any process where one factor varies dependably on another, be it purchases of a product, the stock market, or pretty much anything in science; and experience in higher math will enrich any career–if not for the direct applications, then for the experience in logic and problem solving, as fallenchemist said.