Notes and the first person plural

My notes for whatever I happen to be working on usually take the form of spider diagrams done in pencil (love the flow of a propelling pencil on paper...) in lined spiral bound A4 notebooks(difficult to get unlined, I would if I could, but don't want to pay lots) . These gobbets of thought generally discuss what happens, why and how in any given scene (or even conversation) but, occasionally, I have discussions with myself, in pencil, about where or how the scene should go. In these discussions, I address myself in the first person plural, as in 'do we think it's a good idea to...?, 'shall we get x to do y..?'

This has only recently struck me as odd, despite the fact that I know I've been doing it for two decades or so. Does anybody else address themselves this way, or am I alone in this particular kind of personal identity instability?