I´ve been avoiding this due to the chaos (moving and such), but some good points were made - let me see if I can catch up. If I can´t I will leave it for the moment and come back later.
I´m aware of mirroring, but it´s true what
@Searching4Self wrote - there is a great deal of hyper-vigilance involved. I am constantly aware of the mirroring - the very subtle details that I aspect "normal" (ahem) people aren´t aware of. All their mannerisms, all their gestures, the way they gaze, the way they walk.
If I am looking at someone I dislike I have to hold my breath so I don't breathe their 'essence' in. This can happen in real life or on tv/film, and it also happens when people walk past me, or if they are walking in a line with me.
I can really relate to this. I don´t do this exact same thing, but as I wrote, there are a lot of small behaviors I have to "cope" with the sense that I´m being overwhelmed/overshadowed by someone else´s identity. In my case it extends to smells people have (perfumes, cooking smells, detergent smells, even exhaust fumes). I feel as though those scents somehow "carry them" and I don´t want to breathe in.
My response is usually do to the complete opposite (stop walking, walk in the opposing direction, cover my nose against the smell, burn some incense) so I suspect I am not wanting to get "in line" with them, but rather I feel as though getting in line blurs the boundaries between my identity and theirs. I also feel (perhaps this is not true) that a lot of people do not have a very clear defined identity in relation to society.
By which I mean that they are not aware of their own mirroring behaviors, maybe certain instincts (like buying products that others are buying) and therefore are losing touch with their own identity. Which I find kind of terrifying. If there´s anything in life I learned, is you need a strong identity to survive. Maybe some people do not, but it´s beyond my comprehension.
Perhaps (and I´m just taking a wild guess here) this is my response to having been dangerously close to destructive identity disorder. I want my personality to be completely mine, coming from me (action from me, reaction from others), rather than being a reaction to the behavior of others (mirroring). I hope I´m not rambling. It´s late and I´m really kind of tired.