Haha, Peasant's Quest is the best. I love all the parodies of old games on Homestarrunner.com (and I love old games, so, yeah, that's probably why).

If you wanna give Monkey Island a try, I recommend the special edition a try. It's completely 100% true to the original, just with updated graphics, sound and user interface. It is point and click, not text-based like the really old Sierra games, but the storyline is absolutely hilarious. Trust me, it's completely worth it. :D