Earthbound was amazing! It first released with a guide even if you rented it at blockbuster you got a guide with it. Years later I played it through again and discovered all the little quirks like standing in the waterfall for several minutes, everything you need to know can be discovered from talking to npc's.
FF6 was great in every way. If anyone out there loved FF6 and you haven't tried FF5 you should!
Edit:
Forgot to mention. FF5 and FF3 are very difficult compared to FF6. It makes FF6 seem like a pre school game holding your hand the whole way. I really enjoyed the difficulty though and getting to play older style rpg's again.
Finally I have to say this... I hated FF4 After years and would not recommend it to anyone. The version I played though was the DS pc version I think that has a lot to do with it. I would have loved it more playing the 2D version but it's not sold on square enix store or steam.
