I have referred to myself as we for a long time but not in front of other people. I would say "come on we got to get going" I always rationalized it away as a reference to me, myself and I. "We" never felt odd to me. But I was conscious of what people would think so I didn't use that word in public.
After my diagnosis of DID I was overly aware of my use of the word and I stopped doing it. It is only recently that I have began using "we" again when talking about myself.