1. Arbiter's Grounds. I too am a sucker for desert temples, and have never been disappointed. I loved the battle to get in, and while I personally disliked the poe hunting, The item, atmosphere, sick miniboss, and epic finale rank this as #1 in my book for Twilight Princess.
2. Snowpeak Ruins. Frozen-over mansion on a column in the middle of an extinct volcano? Awesome. The dungeon enemies were annoying as all get out, and the music lackluster (like all
TP dungeon themes), but everything about the architecture and boss made the dungeon completely worth it. Blizzeta Phase 2-3 remains one of my favorite boss themes ever.
3.Temple of Time. Now, I agree, this dungeon was ridiculously easy. The item was barely more useful than the spinner, and the boss was hardly less of a pushover than its
Oot cousin. But the atmosphere, architecture, and miniboss were all sweet. Music was the best out of the dungeon themes too, imo.
4. Goron Mines. This was a really cool temple that was not restricted to the use of just one item. You actively used both the iron boots (in a ridiculously awesome way, I might add) and the bow to solve the puzzles. The mining machinery also made a good impression. The boss, while easy, was still pretty cool.
5. City in the Sky. This temple had so much going for it. Dual Clawshots, easily the coolest and most useful items in Zelda history, made their debut, the miniboss was unique if easy, and the dungeon itself's puzzles, atmosphere, and genuine coolness made an impression on me. Unfortunately, horribly annoying music, stupid Oocca (?), and a poorly-designed/cliche boss detracts enough from it to earn the #5 position. It's sad, really, because a few tweaks and this place would be worth a second playthrough all by itself.
6. Lakebed Temple. Most thought-provoking dungeon, as it was anything but linear. Deku Toad wins style points, as does the pretty epic boss fight. The fact that it involves so much water, and doesn't really stand out prominently in any way ranks it lower, though.
7. Hyrule Castle. This dungeon, if one could call it that, had really good music that preluded the final fight very well. Like most final boss dungeons, it was a conglomeration of every type of trial you could face, and didn't have a prominent theme to it. While its difficulty was enjoyable, the Castle really didn't have anything unique or new to offer, and fades into the background behind the others. Final Boss redeems it, kinda. Not really.
8. Forest Temple. So, yeah, this place was the first dungeon. The miniboss was more fun than the actual Fused Shadow guardian. There isn't much to this place, but it's better than what's to come.
9. Palace of Twilight. It left no lasting impression on me, other than a tron-esque climb to reach Zant, while trying not to get turned into a Wolf or teleported back to the beginning at inconvenient times. Not even a cool item to show for my efforts. I barely even remember this one. Might have been better if we got to see more of the Twilight kingdom, but no.