Well I think some of Bayoneeta's boss fights were the best to be found in any action game. True Jubelius was a bit dissapointing, but I haven't seen anything as good as like you said Father Balder or Aseir. The Aseir fight is in outer space which is epic on such a grand scale.
I quite like the Alurane boss fight as well.
You can tell that these guys were coming from the Mundus boss fight that took place in outer space in DMC1. DmC should've featured something similar with Mundus with how Platinum Games did Aseir.
Oh yeah, I forgot about Aesir, I've actually really liked him too. I think I simply don't enjoy really big bosses like The Savior or Insidious. I think it simply felt weird because, lets say in Insidious' case, you didn't fly to the eye of the boss, it felt more like the boss flew towards you so you can hit him in the eye. I think big bosses like Temperantia were done a little better because you actually felt in control where you went.
So yeah, I'd say that I simply don't like big bosses but I do agree that Bayonetta has done these kind of bossfights the best out of any game I played. Encounters like Aesir, Father Balder and Masked Lumen are also unforgettable.