I have Caps Lock remapped to Ctrl and I'm much happier for the change.

I once wrote an interface to a warehouse inventory program, where I had to work in the warehouse on a sawhorse table and no chair. But, the *worst* part was the forklifts flying by behind me driven by forklift operators who were keeping coolers of grain alcohol punch in the warehouse. I went to lunch with them and the waitress brought them "their usual", two shots of bourbon and a beer.