A common thing that bothers me with Japanese games, has to deal with the chibi and young characters.
First of all, something feels very off to me about an elementary or middle school aged child, departing on a epic adventure to save the world. It's cheesy as hell, and frankly, even when I was a child I would have thought so. I wanted to play the big kid games, with heroes that looked the part, when I was a kid. I don't get why they do this. Anyway, it's completely immersion breaking to me, right off the bat. I'm not able to play stuff like Ni No Kuni, to the point that I might as well be violently allergic.
Chibi characters are obviously annoying. I find that outside of Japan, they have poor appeal... Although, a small portion of the female audience likes them. Overall, something to leave out of a big mainstream production, for sure.
Then there's the perv stuff. A 14-15 year old girls is often shown in sexualized ways, or made into a primary romantic interest. In the case of Bravely Default, Agnès was supposed to be 17 in the Japanese version of the game, and the western localization puts her at 20... but her artwork screams 14 to me. And I'm NOT OK with that. It's fricking creeepy. Persona games are GREAT, but... the highschool setting is really off putting, especially since you can end up pursuing romantic relationships with characters of the opposite gender.
I just want to be able to play an adventure where I don't feel like a weird loser pervert for enjoying it.
Anyway, Final Fantasy 13 isn't that bad in this regard. I mean, Vanille was too damn young, but they didn't go overboard with sexualizing her image (compared to the other creepy Japanese games), or at least didn't push her at you to a point where it's not avoidable, and at least Lightning actually looks like she's in her 20s.
So 13 isn't bad "for Japan", but they still pushed the Japanese pervert BS too far in my opinion. After the first game, they needlessly upped Lightning's boob size to just humongous levels for no apparent reason, for example. Why?! I just don't get it....
Japanese game devs are stuck in the past. A past where old gameplay ideas like random encounters were acceptable. The mainstream audience was dominantly young boys. A past where it was OK to raise your female heroine's cup size several magnitudes just to make her better for the young boys to gawk at.
But, for a Japanese game, the FF13 universe isn't that bad... Lightning is an interesting character, and I could probably tolerate "Japanese game" related issues in Lightning Returns. Nobody is going to hold a gun to my head and force me to put her in a miniskirt, with a bunny ear hat... but, by the looks of it, if I want to benefit from stat bonuses from different outfits, I'm going to have to have a really high tolerance for such bullshit.