This is a good read. I had a theory about dream characters and their personalities, though I won't be able to prove it but its just another possibility. Couldn't is be, that the dream characters that are seen in a dream are not necesarily only aspects of your own self but rather a mixture of personality traits the dreamer might posess as well as personality traits that the dreamer has seen in other people they have met in the waking world? The possibilities would seem to be vast considering the number of people a person might come in contact with throughout life. Unfortunately there wasn't anything that made me come to this theory other than just thinking about it for a second because it does seem logical since the dream world is all created by the dreamer's mind (as far as I know anyway but I could be wrong).

Well that's my one cent. Let me know what your opinion on it is.