I think the question posed in this thread is similar to ones you see all the time and its really an unfair question. You can't lump an entire genre together and call it "good" or "bad". To be honest, I don't think anyone can even honestly say they "like" or "dislike" an entire genre. Because no matter what genre you're talking about, its bound to have its sparkly gems, and its bound to have its not-so-sparkly pieces of dung.
As far as JRPGs are concerned there are some I REALLY like (FFX), and there are some I completely despise (FFXII).
The same is true for any "grouping" of things. Take music; I mostly listen to country (I know, flame away), but I don't love or even like EVERY song. By the same token I like some songs in almost every other genre too.
The times when someone unequivocally hates everything in one genre are few and far between.