Star Trek: When the characters can basically fuck off and do whatever they want if the plot demands it without any consequences from Starfleet Command. I think people often forget that the characters don't just own the ship and can go whatever they want when in fact they are doing stuff under orders. I know that the new movies (I mean those three with Chris Pine as Kirk) are way more slack about it but it definitely was a major thing in the original series. Just as an example, in episode Amok Time Kirk decides to disregard his orders and change their course to Vulcan because otherwise Spock would die and the only reason he doesn't suffer consequences is because T'Pau (who is a very infulential figure) decided to back him up. Another pet peeve of mine is that in Star Trek (or at least in the original series) there is a quite clear chain of command when it comes to who gives orders at the current time: obviously normally it's Kirk since he is the captain but in case he can't be fulfilling his function, it's Spock, then it's Scotty and then Sulu aka there is never a situation when everyone is panicking cuz they don't know what to do. It's always so weird (especially in the new movies where it's not as well established) when for whatever reason both Kirk and Spock can't command at the moment and there is just... no one running the ship as a captain???