-I loved the focus on only new Pokémon for the first game as I liked the idea of having to start from scratch and experiment with the different options rather then defaulting to old favorites.
-While the dex is often attacked for some of its Pokémon, it's home to some of my favorites such as Hydreigon, Archeops, and Sawsbuck.
-Speaking of favorite Pokémon, I love the Tao Trio and I think overall they had the best handling in terms of their lore and story implementation, I also liked how their designs played off of each other.
-I liked the storytelling, I enjoyed that they focused on the main villainous team for BW1 and it was good to see it continued into B2W2 rather then repeating it with a third version. I also liked N and Colress, particularly the former as he goes through some notable changes across the story.
-The rivals, Bianca and Cheren have their own story arcs and it was fun seeing how they grew up and pursued different jobs based on that development.
-The Memory Link was an excellent idea as it rewarded you for having the previous pair, and you got story and character development (ex. Iris) as well as little treats such as items and Pokémon.
-The map, while linear, had some really nice locales and did allow you to explore around the surrounding area if you felt like it.
-Side/Post-game content, the Pokémon World Tournament, Join Avenue, and Funfest Missions were fun to mess around with.
-The OST was one of Pokémon's strongest.
-The Gym Leaders had more of a presence to them, they also had excellent gym designs which was helped by the variation in music of the Gym Theme in the sequel.