Any RPG, if i have played it i will tell you, but go nuts. could be very old from the NES days to now.
Any RPG you played and liked
Most Helpful Guy
You are roughly my age and I have to assume you've played most of the classics, but I'll list everything that was essential to me growing up as an RPG fan, plus a few into my adulthood. Obviously we all have our tastes and I'll admit up front I am not a huge fan of a lot of the newer, western style of RPG (Skyrim, New Fallout games, etc)
Final Fantasy Series - FF 4, 5, 6, 7 and 9 are all the best of the series, in my opinion. Particularly 4 (and its sequel on the PSP!) and 6 as they are the definitions of what I expect from a Square RPG world and battle system and most of the newer games have deviated from their storytelling and gameplay style that they just do not appeal to me.
Chrono series - Chrono Trigger is widely regarded as one of the best RPGs of all time. It's a must play. (as I'm sure you have) Chrono Cross, while not being as good as the first game, was still worth checking out and playing through. It's a complete travesty that this franchise isn't being continued by Squeenix. They have no idea what they are doing, to be honest.
Dragon Warrior/Quest series - Pretty much the entire series is worth playing as they've never deviated that far from what made this series popular. In particular, I'd say 4, 5, 6 and 9 should all be checked out on the DS or emulator and 8 was really good on the Playstation 2.
Breath of Fire series - The first 3 games in the oft overlooked Breath of Fire series are actually quite enjoyable. It's a shame this entire franchise has been put on the back burner, but the last two games they've released didn't live up to the standards set by the first 3. They did enough to differentiate themselves from the FF and DQ series while making everything feel comfortable. Solid, overlooked franchise.
Tactical RPGs - While a slightly different genre, I LOVE these types of games. Final Fantasy Tactics is my favorite game of all time. Both Tactics Ogre games (made by most of the same team that made Final Fantasy Tactics) are both fantastic with deep, serious plots. Jeanne D'Arc for the PSP is another overlooked gem.
I'm quickly running out of room so I'll just list a bunch of random ones that are worth checking out as well.
Secret of Mana, Secret of Evermore, Super Mario RPG, Dragon Age Origins, Legend of Dragoon, Xenogears and probably a dozen others.
It's a shame that RPGs are essentially dying off or shifting to more action based games instead of the puzzle and strategy variety that I grew up with.2