Converting DnD rules and edge cases was always a bit of fun and became my "hello world" as I was learning stuff.

Years back, I worked at a company where the agreement required them to review any personal application that I created for a year or so after I left. I was super happy to send them iterations of my DM'ing tools - written for Java (micro edition), WinCE, Palm, and any other mobile gadgets I could get my hands on.

Around the 4th application I sent, the pharmaceutical company released me from the non-compete clause. I've always wondered if they were required to try and run the applications.