400 hours?! What is your 'perfect game' like? Are you trying to put all characters stats to maximum or something? (I could never understand that way of playing... ) FF6 : haven't played for some time. Last time was a 'World of Ruins - mandatory characters only(Celes, Edgar, Setzer, that's all!)' + 'no/minimum XP or magic points grinding' + 'only 4 magic users (Terra, Celes, Strago, and Relm)' game out of curiosity, and the game counter said 38:50 just before the final battle, ending level 56, 49, and 49 mostly because I had to walk over Kefka's lair twice. (no way Setzer could have defeated a Statue by himself - especially since he got unlucky enough to run into Goddess.)
Max kills for each character, max items (including Pocketstation-only items) and max gil took the longest.
I love level grinding. It's just so addictive 0_0
That's the downside of being somewhat perfectionist. The pressure is so high i sometimes drop the game in the middle of such runs (if games are big). I have the perception of this "problem" but i can't play any other way. Also, if i miss something and i can't go back to get it, i eventually drop the game too. Then when i get back to them i usually start again so i don't miss a thing.