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What are your biggest GM regrets?
(thelemmy.club)
That things rarely go according to plan is part of running an RPG. The players will surprise you, and often this is entirely fine - in fact, it might result in a more memorable experience and a better game.
But sometimes, things go off the rail in a bad way - and you, as a GM, did not see it coming until it was too late, resulting in disaster and a non-fun experience for all concerned.
And contemplating some of my past mistakes, I am curious about your biggest GMing regrets. What went wrong, and what would you have done differently if you had the opportunity for a do-over?
On the assumption that this is a serious question... Game Master, which in turn is a more generic version of D&D's term of DM/Dungeon Master.
It's a reference to D20 on a Bus, where Katie Marovitch calls herself Dragon Master to troll famous DMs like Mark Mercer, Brennan Lee Mulligan, Aabria Iyengar and Jasmine Bhullar: https://m.youtube.com/watch?v=plGNmsegcJc