Getting feedback is incredibly crucial to growing as an actor. One of my favorite things about performing in theatre classes is receiving critiques from a respected mentor and valued peers. I could feed on that feedback ravenously like an emaciated mutt feasting on Thanksgiving dinner scraps. Constructive criticism allows an actor to know how clearly his decisions are being perceived, what does and doesn't work, and what could be added that he didn't think of.
Typically, I despise group projects. I would rather just do everything myself, because the people I am forced to work with are either going to do it incorrectly or make me do it all anyway. When I simply take care of things myself, the project ends up being of a good, consistent quality and the journey there tends to be more time and energy efficient.
It is, then, a little out of character for me to enjoy and gain so much from working with classmates on something. It certainly helps to have willing, intelligent, and useful people to work with. However, working with other people regarding acting isn't merely beneficial or enjoyable.
It is essential.
The feedback, ideas, analyses, questions, and directions we share create a multi-dimensioned work of art rather than a flat interpretation of a scene. It is with combined forces and common synergy that theatre people can produce life on a stage.