I had a huge fondness for the entire Johto and Hoenn sagas... Especially Hoenn, since I did love May and her rivals a lot. Johto was one of my favorite regions and I quickly grew attached to the episodes and new Pokémon they introduced.
Also one of the few who probably adored Unova for pretty much every reason. Loved the region design and how bigger cities were portrayed in the series, Cilan, the new Pokémon, music, everything.
DP was very well known for its story and character development (as well as when Ash was at his peak as a trainer) but I never could get attached to Dawn or even Brock since he'd been around for so long at that point. ]; My interest in the anime series was lowest at that point.