For me, finishing was the main buzz because it made up for previous failures. It wasn't important to me how many people were actually playing it.
The only game of mine anybody has ever played out of pure enjoyment is Slippery Slope (programmed in maybe an hour, the lowest of all my games), yet when all the others came out, posted neatly on my website, I felt equally proud.
My favorite thing is watching people play Slippery Slope and seeing their reactions, especially cursing out the rectangle.