It varies wildly from person to person, and my wife and I work so well as partners cause we have vastly different lists of what we consider exhausting.
Specifically for me?
Well-intentioned but unskilled people who insist on helping but don't have the capacity to do so or the self-awareness to understand when their efforts are counterproductive
Talking to my side of the family
Checking work emails. Not writing them. Just checking them.
Code-switching to talk to white people.
Watching shows or reading books I dislike just for the sake of completing them
Dealing with zoners in fighting games
Lingering in silent spaces.
Following recipes.
Talking to strangers? No issue. High intensity games? Let's do it. Complicated or arduous manual labor? Hell yeah.