I honestly like Hoenn's saga best! It's what I grew up with and I still really love the characters and the story. I actually watched the entire first half of the anime.
For me, it has to be the Sinnoh Saga. Not only was it the show I grew up with as a Pokémon fan, but it was so fun to watch and rewatch. The characters, the rivalries, the contests, the battles, the story, the everything... it was amazing. Coming in close second is the Alola Sage. It's really off to a great start despite what people say about it.
As much as I did love the Kalos Saga, Sinnoh held a story I was able to watch over and over, I think I saw every episode in that saga. I would watch it on TV, check out discs at the library, record episodes, I was in love with the story line of Sinnoh! Dawn was also a really cool person and she is my favorite female protagonist the show has offered.
Pokémon: BEST WISHES SAGA!!!!!!!!!!! I love anything and everything Generation V! #GeneratonV #BestWishes #NegaishippingForever A BUNCH OF AZELFS SMILING ABOUT Pokémon - Best Wishes Saga: XD XD