I don't play JRPGs either but your first two points have more to do with the anime/manga art style that has existed long before JRPGs, not JRPGs themselves.
I don't really mind turn based combat when it's done right. Neverwinter Nights is one of my favorite RPGs and its combat system followed D&D rules, making it turn based. Of course, the way entering and leaving combat was a lot more of a fluid transition without this annoying screen flashing from the overworld to the combat screen and the way you only really had to control your own character most of the time made it feel less monotonous.
I think my main issue with JRPGs is that, out of the few I've played, there is pretty much no character creation process. Your characters are pretty much prescribed roles as soon as you meet them. What I liked about Neverwinter Nights was finding a lot of ridiculous multiclass combinations and feats to work with and experimenting with those types of mechanics. In JRPGs, you don't really get to choose what you want your character to specialize in or anything like that. I like customizing my characters more than most JRPGs let me, so I don't tend to play them.
The fact that most JPRGs I've heard of are made for consoles/portables and all I have in the way of gaming for now is my PC also weighs rather heavily on my opinion.