I'll start by saying that I though both the High Dragon fight and the final boss fight were pretty cool in their own ways. I especially liked the bizarro involvement of statues in the latter, which reminded me of some crazy Harryhausen scene and caught me totally off guard.
The reasons I might choose never to endure either of these figths again are: A) both are torturously long, and

both follow the same transparent pattern of absorb a certain amount of damage, then exit the battlefield to summon mooks, return when mooks have been eleiminated, repeat until dead. It's a bit of a mood killer for me, because having these epic fights in a 7th generation release reminds me that I'm playing a video game about as much as a big monkey shuffling back and forth and rolling barrels at me. If anything, I prefer battles like the one that ended Act 2, with all the mooks present at the beginning and the whole thing just playing out as a fight with an army and its leader as one of the combatants.
Anyone else feel this way?