The first time through the game, without a guide? I definitely explore, and backtrack, and open every chest. If I play the game again, I'll probably use an faq/guide and see what I missed, and any other time after the second I'll know what to do and try out advanced strategies. Any time after that I'll speed through the game, only playing because I really like the game for nostalgia or I like the story or something. (FFVI, SO3).