Re: The Aligorical Aliens!
TNG sort of mixed up the Klingons and Romulans I think. In ""Balance of Terror" the Romulan Commander tells Kirk they are creatures of duty. Somehow, that gets assigned to the Klingons instead in TNG, leaving the Romulans floundering for a contemporary parallel. The Chinese connection surprises me, as I don't believe I ever heard it assigned to them until recently.
Borg - Americans, consuming everything through homogenization of cultures.
Curly: Moe, Larry, the cheese! Moe, Larry, the cheese! (Horses Collars, 1935)