Yup, nothing like ol' Kanto. The things I liked about Kanto
Brock's crush in Bulbasaur and the Hidden Village: he was very embarrassed about it and whever Misty or Ash would mention Melanie and his crush, he'd nearly wack them with a mallet. It was so cute. Now all he does is just randomly walk up to them and try to flirt.
Team Rocket: mainly James, he sounded much less "gay" and I liked that about him. Meowth also sounded much better. And their Pokemon in that season were awesome!
The gymleader/filler deal: Okay, so now we have like 15 epis in between the gyms and even with the Battle Frontier. But back then, there was only one episode in between Brock's gym and Misty's gym. Then there was at least six episodes in between Cerulean City and Vermillion. The fillers then were exciting and new.
Ash's intellegence: nuff said, stupid trainers = funny seasons
Misty's personality: mallets, constant yelling and not letting people walk all over her. Of course this changed once she got the "Bad Egg"
The banned episodes: three in one season, now THAT'S a record!
There is so much more about Kanto that not even Johto can compare. Simply, that's why Kanto's the best. And the animation was pretty darn good.