Knights Field series. I never could get into them back in the day, but I've been on a retro kick with my Anbernic and got sucked into them. Ended up putting 20 hours so far into the English translation of the first Japanese KF.
Also, Vagrant Story. Pretty much same scenario where I rented it back in the day and bounced off the combat for not making any sense to me. Tried it recently and really dig it. The combat system is really quite clever once you understand it.
I had always avoided the Kings Field series because it looked like the gameplay didn't age well, but honestly after playing through Lunacid I think I have to seriously give them a try.
I'm also watching a retrospective on the development of Vagrant Story right now and as a jrpg fan it's wild to me that I never knew it existed back in the day. What they were able to accomplish in a PSX game is crazy. It makes me want to give it a try also