Sometimes I need to run something just once to get it out of my system. Nobilis was like that. My QAGS: Superfriends game too. I had a itch that needed to be scratched, now that it is scratched I don't think about it much any more.
I'm sure my desire to run an apocalyptic zombie game is one of these one-shot urges. That's the main reason I have refrained from shelling out the money to buy All Flesh Must Be Eaten*. At one point I considered using Sean Wipfli's rules-light indie zombie game Dead Meat, but ironically the rules were not meaty enough for me. Now the folks behind Savage Worlds have put out "Zombie Run", a new number in their "Savage Tales" series that just might fit the bill. And it's a only a seven buck download at rpg.now. Even better, I feel like I could scare up some players from the bunch over at the pancake joint.
*AFMBE probably has the most evocative name for an RPG I've seen in years. You just about need to go back to Traveller or Dungeons & Dragons to find a more spot-on RPG title.