I remember the very first time I played Monkey Island: The day after I was going for vacation for a whole month. I was 12, and I couldn't take that game away from my head after playing just one hour! I must say MI was my first graphical adventure, so it was a new genre for me, and amazed me from the beginning.
I spent that month thinking in the game, and hoping to get back to school (and home) just to continue playing.
BTW, It took me DAYS to realize that I had to open that damn cereal box to find the key of captain's cabin!!

Happy birthday Monkey Island. Thanks for thousands of great moments!