The last game I finished was Disco Elysium, before that I can’t even remember. It is not a common occurence. I’ve played some short indie games like Death & Taxes to the end, but bigger games, maybe Dragon Age Inquisition or X-COM2 but that’s years ago now. Currently I’m sort of between games, I’ve got a Total Extreme Wrestling save that I dabble with now and then when I have some spare time.
Has nobody recommended Aviary Attorney? It’s a bit wacky, but in a good way, takes a good chunk of inspiration from the Phoenix Wright: Ace Attourney games. Some good mysteries to be solved.