In terms of male designs, I like Paul, Barry, Brock, and the old iconic Ash. I liked Meowth for his standing on two legs since Meowth way back when was designed to stand on fours like a cat, but since Nintendo leaned more toward Team Rocket Meowth for the Pokemon design, it's less interesting to me.
For female designs, I like Dawn, Officer Jenny, and Flannery the best.
Ash (D/P) - i know most of you americans would say "but Bartek, Ash's changed voice in those series!" Well not in poland (well except session 10 where he's sounded like a man, from session 11 Hanna Kinder-Kiss returned to voice him), also it's a brief of fresh air after seeing him in Kanto/Johto and Hoenn clothes, and i'm not a man of brown eyed Ash from Unova onwards
Misty (first apearence) - As a fan of midriff baring girls i found her design to be amazing even when Pokemon TV switched to computer animation during the last episodes of the Johto saga.
Marian/"Marion" - Just like Misty, i am a fan of midriff baring girls, but Marian's polish voice is also cool in my eyes
Prof. Rowan - He's a pokemon prof. from my fav region also he was a moustache (It's funny cause this guy also voiced Paragus in DBZ before he retired and later died)
Paul - He has a good design yes, but his personality is meh