Pretty much, each season tends to have one big central mystery that is slowly developed, some are more compelling than others but they're all very fun in an absurd and over the top sort of way. The characters have their own personal arcs that carry through and there are also plenty of little one-off storylines.

Definitely not much in the way of an overarching plot so if that's your thing it might not be for you but it's fun to watch the characters and their relationships develop as they move through different stages of their life, there's definitely a good deal of continuity, it's just not so structured around strict plot development.