Even though I love Pokémon, I'm gonna say the past 2 or 3 generations are becoming... bland?
I love the battle system in the latest generation, I mean in Generation III, they split the Physical and Special Attack by type, which was pretty stupid.
I love the Mega Evolution, it gives a sense of surprise and adds depth to strategy during online battles.
But as games themselves, the story, characters and locations are pretty bland and forgettable. Probably the most memorable is D/P/Pt and B/W story is to me, otherwise the other story is pretty forgettable.
I don't think the newer Pokémon games should get praised often with the direction Game Freak is heading.