@LoamImprovement For 5th edition, I've overwhelmingly played in AL, so ...
But I've seen a LOT of "inspiration can be used for a reroll" and "inspiration can be shared across the table".
I've also seen (too much) "Invisibility == Hidden", which I hate and don't use when I run. I've also seen a large number of variations of the bonus-action-casting rule
AL kinda inherently runs with a "every adventure starts with a long rest" pseudo house rule, which I like.
@LoamImprovement I hate it when I'm the invisible one. I'm frequently telling dms "oh, I'm not hidden. He should know where I am/what square I'm in"