I think most of us play JRPG's only once, often for the story as well. But are there games for you you already have played a few times and could start that any time?
My most played game at all is probably Final Fantasy X, hadn't much games as a child and my sisters always deleted my safe state. Even today i play i all 4-5 years. And i guess every Fire Emblem for me because i try to beat different challanges. Iron Man or only certain chars, nothing to hardcore.
The SaGa series are pretty good JRPGs, both in terms of gameplay and story. My personal favorites are:
Octopath Traveler is really good too, with the second one in the series being the best one.
I played the first Octopath Traveler for about 80 hours. Quite good game but i wouldn't play it more often because i always thought it's level scaling is not perfect, switch between hard and very easy parts. But can't say something about the second one.