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So far, I'd say XY > SM = DP > OS > AG > Johto > BW.
In all seriousness, I want to hear why SM is hated, pretty much all of the "criticism" towards the series that I've seen is about the change in artstyle, or about cherrypicked in-between frames.
It seems that they haven't reset Pikachu this time around. Ash hasn't changed much either, besides the art style and acting more like a 10 year old, but most of the time it's not too noticeable. The animation is a lot more expressive and fluid, and the battles, so far, have been pretty well-done (and the one in the upcoming episode between Ash and Hala looks hype).
If they cover the main plots of the games, including the Aether and Ultra Beast arcs, I see a lot of potential in this series.