The last dungeon I completed was the Fire Temple in OOT. During the marathon this weekend I decided to try to play along with OOT but got really sleepy after the child dungeons. So I've been casually playing OOT a little since then. Out of all the adult OOT dungeons, I think that the fire temple is the most straight forward. There aren't any weird hidden rooms or secret switches to push before you can go on. You go in, free the imprisoned Gorons, hammer some stuff and go fight a dragon. The rooms lead easily to one another and the Goron clues make getting the compass irrelevant (I didn't get the compass during this play through and didn't even notice until the end). The miniboss is sufficiently crazy but not so much that you just waste a bunch of items. Plus, c'mon, Darunia is awesome. All that sworn brothers stuff. Soon I will be doing the Water temple in OOT, the Lakebed temple in TP and the Great Sea temple in MM (see a pattern of stoppage? ;P).