We may have to adjust the qualifications as to what made a great pilot for the show, but for now I will provide the following conditions: It felt like the closest to an episode of the series, did the best at explaining almost all aspects of the game, and the game on the pilot itself was pretty exciting.
If you want you can pick the best pilot for a series that went to air and a pilot for a show that didn't get picked up.
I always seem to go back to the pilot for Press Your Luck. With the only changes to the game being four questions per round rather than five, that was an exciting game and almost every normal possibility for a game was there.
Let's get the debate started.