They make good fiction, and they make fun of it themselves.
A rattling mixture of time travel, action, philosophy, black humor, vulgar jokes and banter. In the perfect proportion. No more, no less, like a good chef's signature dish.
Black humor is not disgusting, jokes below the belt are more ridiculed than real, there is a banter over everything, including themselves. Very good post-modern in general.
And yes, the story of Maya in Season 3 is simply magnificent.
P.S. Not for everyone. 18+ and below-the-belt jokes in Rick and Morty style