Sounds like you've played most of the English SNES RPG's.
So here's a list of what GameFAQS considers to be RPG's and stategy games for the SNES:
http://www.gamefaqs.com/console/snes/list_rpg.html
http://www.gamefaqs.com/console/snes/list_strategy.html
I included the Strategy list because alot of those games have RPG elements to them, and are fun to play too.
So, pick a game on that list, and if it's in Japanese, check these 2 lists to see if it's been fully translated to English yet:
http://www.fantasyanime.com/garden/translations2.htm
http://donut.parodius.com/?func=trans&platform=snes
And since you asked about PSX too:
http://www.gamefaqs.com/console/psx/list_rpg.html
http://www.gamefaqs.com/console/psx/list_strategy.html
There is currently only one Jap PSX RPG that is being translated (Tales of Phantasia) but so far no patch has been released.
But there are plenty of English PSX RPG's/Strategy games to play, if you haven't played them already.
Finally here are the Gameboy, GBC and GBA lists.
Gameboy/GBC lists:
http://www.gamefaqs.com/portable/gameboy/list_rpg.html
http://www.gamefaqs.com/portable/gam..._strategy.html
http://www.gamefaqs.com/portable/gbcolor/list_rpg.html
http://www.gamefaqs.com/portable/gbc..._strategy.html
And the ones in Japanese that have been translated:
http://donut.parodius.com/?func=trans&platform=gameboy
GBA lists (lots of games here too)
http://www.gamefaqs.com/portable/gba.../list_rpg.html
http://www.gamefaqs.com/portable/gba..._strategy.html
Not too many translated yet:
http://donut.parodius.com/?func=trans&platform=gba
