I have had the drive to create games for as long as I can remember. When I was a kid, I made a roleplaying game where you could play as one of two ninjas who roamed the earth doing good deeds and righting wrongs (ahh, the eighties). It used Rock, Paper, Scissors instead of dice, had pre-generated character sheets hastily scribbled out on graph paper, and worked about as well as any game thrown together by a ten-year-old in one day...after school...in lieu of doing homework.
Games have always been more than just a plaything to me, they are tools. Intricately ornate, often beautiful, tools with which humans craft positive shared experiences. As a child I learned to make friends, how to be social, how to relieve stress, stretch my imagination, grow my critical thinking, and countless other things all through playing games. As an adult I still learn more every time I play.
A good game is one that enables the people playing it to create fun. The more people can successfully employ it to do so, the better the game is.