may not be right on target but my thoughts on movement
Movement i believe is one of the biggest things that is overlooked. Not everyone is taught how to move and not everyone considers movement when creating a character and also not everyone is comfortable with every sort of movement. For me movement is everyhting, movement is my whole character and if you have ever seen me act you understand why.
Actors should be taught first thing before they start acting to start with a warmup it doesnt even have to be anyhting big it just needs to be something small to warm up your muscles and get your body prepped for movement that night. For me i listen to a bit of music and stretch a bit to get pumped and get the blood flowing and to loosten up my body for a very different type of moving than just everyday motion.
With creating a character or bringing one to life i like to study movies, pictures, and music videos especially. I like drawing inspiration for movement from watching dancers most of all though. Dancers offer such a wide range of movement styles, motion and flexibility i think they are fantastic to emulate in acting.