Most surprised by Spider-Man. It hit a sweet spot for me that few games ever have. I never felt frustrated or bored. I never got tired of swinging through the city. The only thing I would change would be to put in a nemisis system after the story so I could just keep going. But I want that for all open world games.
Most disappointed by Hollow Knight, in that it isn't my cup of tea like I wanted it to be. I kept hitting a wall and the effort to push forward outweighed my joy in playing. No shade on the game, it's beautifully designed. I might love the idea of retroidvanias more than ever playing them.