-Kanto-
Favorite: Sabrina (The O.G. *gulp* gym leader. Psychic and Alakzam was freaking stupid OP in gen 1, and I always remember Sabrina being dangerous as hell)
Least Favorite: Erika (I still have this painful memory of my first Pokemon Red playthrough, where Pidgeotto would get put to sleep and wrapped and never be able to attack once)
-Johto-
Favorite: Morty (The shroud of mystery that just surrounds you when you look at him, the eeriness of his team and Gym, it's awesome, also he's pretty cool at the burned tower)
Least Favorite: Jasmine (Oh you just beat Chuck now fly over and face two pokemon Steelix and something else no one remembers, there was no trainers, no puzzle, and it's completely forgettable)
-Hoenn-
Favorite: Flannery (She's awkward in a really good and funny way and also uses one of the best types Fire)
Least Favorite: Tate and Liza (Fuck double battles yo, real trainers battle 1 on 1, no gimmicks)
-Sinnoh-
Favorite: Volkner (Awesome Gym Puzzle, and that I don't give a fuck attitude I used to have and often times want back)
Least Favorite: Wake (Dude's straight up annoying with his songs among other things. Don't care for him)
-Unova-
Favorite: Skyla (She's pretty cool, I dunno not really much of a good reason for this one)
Least Favorite: Burgh (Dude's waaaaaay too flamboyant for my liking.)
-Kalos-
Who cares?
-Reborn-
Favorite: Aya (The first Gym Leader that I really got stuck on and really had to go back time and time again even after reworking my team to beat, she also has a nice interlining with the story later on, I suppose all the characters do thanks to Ame's writing, but Aya stuck out to me.)
Least Favorite: Terra (As a ground type fanatic myself, I find her actions deplorable.)