VidUKon Vidshow help - Tropes!

As everyone else seems to be doing it - hi internets, please help me with my VidUKon vidshow! The theme is TROPES, and if anyone can think of a better title than such_heights's suggestion of 'Tropetastic!', please do let me know :-)

So, this is hopefully going to be a joyful show celebrating all the fun that can be had with the tropes that crop in in all our favourite shows. Obvious examples include time loops, doppelgangers and bodyswaps. Tropes can also be character types - the dorky scientist, the badass warrior woman, the unlikely hero...you get the picture. I'm interested in patterns and parallels, so there will probably be a lot of multifandom vids in this show - but if anyone has recs for tropey vids that are confined to a particular fandom (particularly long-running shows like Doctor Who or Star Trek), those are awesome too.

Please rec me vids! When I put together the Constructed Realities show last year, everybody's suggestions were incredibly helpful. Even if you think a vid is really obvious and I've probably seen it, remind me about it anyway! And self-recs are very much encouraged :-)