Deadpool 2: It's less of a sequel more of a part 2.
Director David Leitch provides this Deadpool with far crisper action sequences and a larger amount of jokes than it's predecessor. However, the story is significantly lacking in comparison to the first. The sequel needs the first one to survive and really can't stand on it's own. A big reason this film works as it does is because of the callbacks it brings up from the first.