To me, Twilight Princess has always just been a possible Zelda game- not amazing, but not awful. I found it to be fairly bland overall. I don't hate it. In fact, as mentioned by TC, I enjoyed being a wolf, the hidden skills and other secrets. Dungeon design wasn't bad IMO. But overall, it felt sub-pair the rest of the series. Mainly, I just felt the game was seeming uninspired, and only made to appease those who disliked Wind Waker.