Red Flags for DMs?

[Naez]

so in summation keep an eye out for:
-Massive amounts of houserules
-Not actually playing the advertised system
-DMs forced into the position
-Banning pretty much anything, unless there's a setting reason for it
-Allows everything
-Disallowing Evil alignment
-Low magic/fantasy
-Gritty realism
-Fumble rules
-DMPC
-Anything involving sex
-Railroading
-Long episodes of narration with no player agency
-Arbitrary rules changes
-DM refers to them selves as God
-Plans to turn campaign into a novel
-Has run the campaign before
-Multiclass penalties
-Low point buy
-Rolling for stats
-Nerfing mundanes
-Edition favoritism
-Allowing personal relationships to spill over into the game.
-Actively trying to make the paladin fall.
-Banning options for only the players.
-Lack of system mastery
-Talks about previous bad players
-Excessively high DCs
-Campaign is nothing but fights
-Pulling ideas from a video game/movie.
-Long fights
-Overly invested in the story (often leading to railroading)
-Inability to improvise
-Bad grasp of alignment
-Core only
-Meatgrinders
-Excessive use of Rule 0.
-E6
-Not tailoring encounters.
-Tailoring encounters to specifically mess with the players.
-Reducing player agency in any way
-Ignores rules in favor of Rule of Cool
-Doesn't backtrack when player are uncomfortable
-Expecting the CR system to actually be balanced.
-Overpowered NPCs
-NPCs are idiots
-DM becomes agitated when things don't go right.
-DM more interested in telling a story than playing a game.
-things happen at the dramatically appropriate time / in the most dramatically appropriate way
-Level 0
-Prebuilt Characters
-All players must take X class
-Not explaining/writing down houserules
-fudging dice rolls
-Doesn't listen to player complaints
-Quests for class features
-Spontaneous Houserules
-Disallows the 'Take a 10' rule
-Makes the character look incompetent
-Doesn't understand the concept of multiple valid play styles
-Use of the term 'Rollplayer(s)'
-Attempts to stop you from reading books
-Cliché plot hooks
-Unbalanced plots (all intrigue, all combat, etc.)
-Mary or Gary Sue NPCs
-Requiring rolls for easily done tasks.
-Making you pull teeth for information NPCs would reasonably just tell you.
-NPCs take the spotlight
-'Survival' games
-Using custom classes available to the NPCs but not the PCs
-No experience as a player
-Bad hygiene
-Obsessed with immersion
-Language barriers
-Starting with ridiculously high stats
-Allows Massive LA Buyoffs
-Thinks the PCs don't matter
-Session long Player-NPC interaction sequences
-Retroactively changing rules.