6. Never get to play.
A few games came to mind when I started thinking about titles I love that I never get to play. There are many I have never played, but I think they should be excluded. So games I have played that somehow illude me now.
Conan 2d20 comes to mind. I only played it once and since have only GMed. I'd love to be a player someday.
Hollow Earth Expedition I've GMed but never played. Pulp is one of my favourite genres but I've never been a player.
But the big winner would be Gamma World, most likely 2e. I love gonzo post-apoc and have tried a bunch of the more modern games, but GW is where my heart sits.
A world that is equal parts confusing as it is dangerous to eek out an existence. That's my jam.