I loved playing the original Oregon Trail as a kid, with the fluorescent green graphics and the simplistic Y/N commands. Taught me more than 5th grade history ever did.
Disappointment is a gift too. I used to love those rectangular chocolate after dinner mints. What if you combined them with the heart candies that come out each Valentines to create a new message candy about the little annoyances of life?
I used to make my living tweaking pixels in photoshop. Let me tell you, sometimes I have pixelated nightmares. The word dithering is akin to heavy rain on my day.