You can dump a ton of money in to a game and still have it look (though more importantly feel) cheesy. The korean style MMO often feels detached from the surface of the world with clumsy animations that simply don't feel good to maneuver around with, almost as if you and all other NPCs/creatures/pets/etc don't have any weight and glide across the land rather than walk on it.
I've tried a plethora of MMOs and run in to this personal issue in most of them, with the only exceptions off the top of my head being EQ2 and WoW, and to lesser extents Wildstar and Guild Wars 2.