One series that definitely deserves more attention is "The Critic." This animated show, which aired from 1994 to 1995 and had a brief revival in the early 2000s, follows the life of Jay Sherman, a film critic who reviews movies while navigating his personal life in New York City. The humor is sharp and filled with movie references, making it a cult classic among film buffs, but it often gets lost in discussions about 2000s animation. The writing is clever, and the guest appearances from Hollywood stars add to its charm.
Another series that often gets overlooked is "The Legend of Korra." While it has a dedicated fanbase, it sometimes takes a backseat to its predecessor, "Avatar: The Last Airbender." Korra deals with more mature themes, including politics and identity, and the animation quality is stunning. It's a brave follow-up to Aang's story with its own unique character development and world-building.
Lastly, I'd recommend "Moral Orel." This stop-motion series started off looking like a kid's show but quickly revealed its dark humor and commentary on religion and morality. The storytelling gets surprisingly deep, especially in later seasons, making it worthy of discussion among fans of more mature animated content.
Each of these shows brings something unique and often gets overshadowed, but they're definitely worth revisiting or watching for the first time!