Ultimate Kitty Pryde is wildly underappreciated
What I love about Ultimate Kitty Pryde is that her characterization actually evolves with the world around her. She's not permanently stuck as the quirky, awkward teenage heroine archetype. The persecution of mutants, the loss of the X-Men, Spider-Man, and the events of Ultimatum force her to grow up. In a world without Professor X, Magneto, Wolverine, Cyclops, she eventually becomes someone willing to put herself on the line for other mutants, becoming the face of the dwindling mutant resistance and the leader of her reality's Utopia.
While I do see people praise Kitty for her role in Ult.
Spidey's cast, it feels like people rarely talk about what she becomes afterward, which is honestly a shame because her post-Ultimatum development is one of the most interesting parts of her Ultimate incarnation.