These days, for me the absolute minimum is full controller support due to the wife acceptance factor. She loved Dragon Age Inquisition so we tried to play Origins a couple years ago, and even though I'd cloned the displays, me sitting behind her at my computer instead of next to her on the couch was a deal breaker.
There are other plusses in terms of WAF, full voice narration and a good story being chief among them. There's a reason the only soulslike I've ever really played is Fallen Order. 😆
For me playing alone (which I almost never do anymore), one example I can think of is trying to go back to Dark Age of Camelot after playing WoW for a while. That was...painful.