I think all of these are equally important, if you're counting arrangements you did when you say "your music". I wouldn't say one or two or three of them are the most important. If I were to take one off, it might be the one about existing repertoire just because I only really feel a need for this with my arrangements of other composers, I don't feel a need for this in my compositions. If there's a comparison to be made between my composition and preexisting repertoire, I probably already know about it before I'm even finished composing the piece.