turn based fighting
too much reading
cliche characters and stories
too much anime
bad voice acting
and the worst of all random encounters.
All of these are what most western gamers dislike about Japanese RPGs and is why they have fallen from the top since the 7th generation.
Actually their sales have fallen off because they stopped doing a lot of this stuff. Final Fantasy X is the 2nd best selling FF game, and it was the last to include turn-based random encounters. They should try getting back to their roots.