Favourite of all time?

Wing Commander (2 if I have to pick one, otherwise 1, 2, and secret missions).

Monkey Island (3 if I have to pick one, 1 to 3 otherwise).

Third is difficult, but… Disco Elysium, I guess…?

(What games I’ve spent the most time playing, though…? Definitely Crusader Kings 2 and 3, followed by Stellaris.)