You know, it's this kind of "too easy" thing that I never really get. When I think of Ocarina of Time, I think aimless sessions trying to figure out what the heck to do next, enemies shoving me off ledges, a camera that didn't even try to work automatically, dreary dungeons with generic elemental themes, generic objects of power, a crushing lack of realism (temples are just friggin' deathtraps), and a painfully simple combat system.
Okay, yeah, it was epic for its time. It certainly holds up today, too, but it just comes up short. Besides its contributions to Hyrule's history, it's story came across as pretty generic since you had pretty much three or four major plot points- leaving Kokiri Forest, getting the Stones and MS, the apocalypse, and defeating Ganon, but the pacing was abysmal- you spend a whopping five dungeons doing absolutely nothing but finding dungeon X and getting medallion Y- nothing ever really happens except at those four major points.
On the other hand, Twilight Princess had sidequests and story development between nearly every dungeon, and even the optional, non-story-related quests were characterized so well that it really felt like you were getting something done. The characters were people, not ATMs full of generic exposition and stuff. Say what you will about OoT's so-called "epic feel", but I've never been too attached to Zelda games without real progression and characterization.
One more thing- OoT, being the first 3D Zelda, while adapting remarkably well to the new medium, still contained gameplay relics from the handhelds and S/NES games, including dungeon rooms constructed in a way that rarely took advantage of the third dimension of height, unlike WW and TP's dungeon design. The monotonous "swing a sword when they're vulnerable" or "use item X" combat formula from the 2Ds was also mostly unchanged.
OoT was graduating from an era of games that had little to no story or characterization, and a format that emphasized precisely-executed strategies over creativity and breathtaking fun. While TP's bosses were easy, they were doubtless much more fun than previous bosses which required lightning-fast reflexes to survive. TP's bosses aren't so much challenges as climactic and exhilarating finishes to the dungeon experience- more of a reward than a final hurdle.
