Yeah, the interpreters were really cool. Being able to write a program, have it run and do stuff, and know that you're the one who made it run is really a great feeling which I'm probably failing to describe properly.

The lazy interpreter was also brilliant--realizing that you can change a language's behavior drastically with a small change in the interpreter is very empowering. Coincidentally, that's what pushed me over the edge to learning Haskell, so I'm extra grateful there.

Overall, the amount of magic that class showed me definitely made it worthy of the wizard on the cover.