I know everyone has that one RPG they fell in love with that will always have a special place for them.
Maybe it was never popular. Maybe it was a love it or hate it and had mixed reviews. Maybe it was a product of nostalgia and the time of your life you played it.
A game where you pick one of multiple characters and play thru the same game world on each one completing a different quest and seeing things from a different angle.
People would say the story is sparse, for me it was enigmatic and mysterious. People would say the battle system was obtuse, too difficult, or required too much grinding. I loved the challenge and getting wiped by it as a younger version of myself who wasn't ready for that level of difficulty, slowly figuring it out just made it all the more epic.
This is a boring answer, but Super Mario RPG and Chrono Trigger for me. Secondarily, Final Fantasy II (by which I mean IV of course) and III (i.e. VI) and V (i.e. V, because I just played the fan translation, sometime after playing the rest of the aforementioned games).
All of these games are just generally solid narrative experiences with effective and well-designed gameplay, coupled with excellent pixel artwork and music. Not all of them are equal in all regards, of course. But probably most importantly, I played all of them during some of the most formative years of my tastes in videogames.
Love the combat system mechanics, love the moveset variety among party members, love the huge enviroments, love the side content in general, love the pacing on the main quest, love everything about it. It was my first JRPG and generally the most formative game for my taste in video games.
I think I have more posts mentioning the game on this site than posts that don't mention it lol. Granted part of that is the current lack of more specific/niche discussion topics (which will hopefully be solved as the site grows) as I do have alot of game interests outside of JRPGs.
Threads of Fate/Dewprism. It's an action RPG with two protagonists so you have to play it twice to get the full story. It was actually one of the first JRPG or JRPG-adjacent games I ever played. Still, it's hard to explain why it left such an impression on me. The story isn't particularly deep and it's not particularly difficult, except for the part where it becomes a platformer for some reason, and I don't think I ever actually finished it as a kid, probably because of the platforming section now that I think about it. But for some reason whenever I feel nostalgic about old games this is the one I always go back to and play through.
Star Ocean 2 is so cool. All the party members are interesting and their interpersonal dynamics are great, which made me equally interested and conflicted that you can't get all of them at once. I played it a whole lot when I was a teen. I'm really looking forward to that remaster.