LogFAQs > #961020006

All of the best ones aren't on your list

I haven't played 3, but if you want something straightforward, cute, and grindy I'd go for 5 or 3. I think they're the two more about the job system

9 is a little frustrating, and the PC version has some controller issues, but the game is enjoyable with the fast forward button and ability to skip battle intros

For 12... you really have to be into the combat system and programming your teammates. You can see mmo mechanics bleeding in. Kind of a slow burn, but at least the dialogue and world building is coherent

15, again, you have to really enjoy wandering around, grinding, collecting stuff, cooking, and so on. I never finished it

13 is just awful in every way

So I'd say 5, 9, or 12 depending on your mood, but none are as good as the ones you've already played