What 5e variant/house rules do you play with that work?
I'll be DMing some more 5e soon and I want to take the opportunity to try some different ways of playing (I'll post my own suggestions as comments so they can start their own discussion threads). What alternate rules have you tried that you thought worked well? They can be larger changes to the game or little QoL tweaks (though if you can respond to the suggestion with "at this point just play [different game] instead" then that's probably more than what I'm looking for!)
I use these Exhaustion rules instead of the ones from 2014 edition. They are not as brutal as original rules and use them alot more than I did the old Exhaustion rules.
-1 per level for all attacks/saves/checks/DC, -5 speed per level(min of 5ft speed)
Additionally
1: 0
2: No Reactions
3: 1 Action or Bonus Action
4: Can't Ceoncentrate, Max 1 attack
5: Fail all Saves, Vunerable to all Damage