Opinions with a dash of nostalgia is the main reason everyone worships it so much, so I can't blame you. I just think VII hugely overrated. It's still good though.
Best - Radiant Historia (Very underrated. ), Metal Gear Solid 3, Mother 3, or Rune Factory 3, Fire Emblem 3, Devil Survivor 3(Overclocked). I like 3's okay?
Worst - Summon Night: Swordcraft Story (I spent 20+ hours on this game. The whole time hoping for something interesting to happen. Nothing.)
(The one good song from the game.)
I have a lot of favorites i know. I just can't choose.
The best game I've played being the one I enjoyed the most and hold dear to me is Okami fro the PS2 however Kingdom hearts and Disgaea are not far off either.
The worst game I've played for bad design is...probably Sonic The Hedgehog (06)
The worst game I've played in terms of how much I dislike it is probably Final Fantasy 13 and it's subsequent sequels (I always finish an FF game once I've started it.)