Thanks EricMontreal22, I'll definitely have a look into Fantasia, I had totally forgotten about that scene. And I'll have a look around for that Manga too, I want to absorb as much as possible. And yes, rotoscoping is rarely successful. Animation is about going beyond real life movements, it's about exaggaration, so it always feels like something is missing when you watch something that is rotoscoped.
Bart: Thanks for the comment, it was very helpful. As an animator, weight is one of the first things that we learn. I really want to portray a sense of weight in my animation, it's very important. Weightlessness is something that occurs in bad animation and it's definately something I want to avoid. I would like moments of weightlessness, when is is en pointe perhpas, but only moments. For the most part I want a real sense of mass. I've been watching ballet, real life and on dvd and I want to be able to show which parts of the body are carrying the most weight in particular movements, when it transfers and all that sort of stuff.
Thanks for the link innopac, that was very helpful as well.