In my internal monologue I instinctively refer to myself as We instead of Me, most often when Iโm planning out my day or creating mental to-do lists.
e.g. โWeโre out of eggs, gotta add that to the grocery listโ, โ Weโre going to get out of work at 11 and then meet So-and-so and do such-and-suchโ
I obviously do not do this out loud in conversation, but in my head I often default to We instead of Me. (I hope this is not foreshadowing a future schizophrenia)