I’ve since discovered “Banned from Argo” (YouTube, Wikipedia).

I love this! Now you need to do an analysis like this one on Star Trek and the Bechdel-Wallace test!

I realize you’re not trying to predict quality, just personal enjoyability, but I do wonder how it relates to quality.

I actually think it might be slightly more predictive of the quality of a show overall than of individual episodes. But both ST:TOS and ST:TNG have many great captain-centric episodes that I’m not sure if it is predictive of episode quality particularly.

Great suggestion! Everyone remembers the Gorn, but the Metrons are fairly representative of the incredibly advanced aliens typical of TOS (like the Organians, Thasians, or Providers).

I think I’d suggest a planet-of-the-week episode. From TOS, “This Side of Paradise” or “A Taste of Armageddon.” From TNG, maybe “Who Watches the Watchers” or “Up the Long Ladder.”