The trend I've noticed with the Borderlands 2 DLC campaigns is that they're all kind of "meh." In each case, the three preceding BL2 DLCs offer mostly just "more of the same" and don't offer a whole lot of truly unique, interesting content. Speaking as someone who'd spent hundreds of hours in just the base game, playing across multiple characters with multiple friends, the DLC campaigns have all felt like fleeting sideshow distractions, rather than something new and fresh.
Tiny Tina's Assault on Dragon Keep (hereafter referred to as "Tina's Ass") is the last of four originally planned DLC campaigns, and it's by far the best one. Boasting totally original landscapes to explore (no more boring desert wastelands) with a nice variety of aesthetic themes, entirely unique enemy types to fight (no more boring bandits), and a compelling narrative premise of being set inside a Dungeons & Dragons-style role-playing campaign, Tina's Ass feels like a proper expansion, and not just a bloated cash grab.