I really agree with the theme based dungeon comments, as well as having non-linear paths to complete the dungeons. To be honest, I would like to see the non-linear idea expanded to a point where you could complete the temples in any order that you want. You would still have to complete them all to finish or get to the last temple, but put hidden secrets in each that require the items from the others. You wouldn't need to find all of these secrets to finish the temple, but it would be candy for those of us completionists to have to go back through each temple multiple times to finally find everything. I know that they have to try to cater to all audiences but I would love to see more difficult and drawn out puzzles as well. I was really a little suprised with some of the puzzles in spirit track, a few of them were actually fairly challenging for a change. There was the block puzzle caves, but that was more of a novelty in the game, even though it was enjoyed.