Just re watched GB and GB2 had not seen either since the 80s
Overall GB is a very good movie and Bill Murray steals the show, every scene/line he has is the best part of the movie IMO. The other leads are great as well, but Murray is to me the headliner.
GB2 is pure trash, it's ok to watch in the way it's ok to watch any other bad move with good actors in it. But the plot, stories and whatnot are JUST NOT THERE.
I'm a big (BIG) move buff and I watch tons of movies I'd estimate 200-300 movies a year legitimate. I love watching older movies especially if it's got an actor(s) I like or if it's a genre I prefer.
Best comparison I can see is Godfather 3 which has many of the same actors, director, writer as the first two movies but GF3 is horrible. I'll still watch it because I love mob movies and sometimes I'll say to myself let me give it another chance. But my god its horrible.
I feel the same about GB2, worth watching because it has the same actors as the first and because the pinball machine, but otherwise it's very bad. I think one scene sums it up early in the movie Aykoroyd and Hudson are down and out to doing GB dance at children's birthday party, it's an apt metaphor for the whole movie. Maybe some will argue they made it bad intentionally like Rocky Horror but I don't think that's the case.