We tend to regard the self that one shows under provocation, or with a few drinks under the belt, as the "real you" coming out. Yet at the extreme we reject that entirely - what a person does under torture or drugged senseless we don't consider to be their real personality.
If some 80-year-old deacon who always knew he was attracted to children and might become disinhibited with alcohol makes it to his dying day with never the slightest inappropriateness to a child, do we say that his "real" self was a child molester, but it just never came out? I don't think anyone would say so.
Or what if he always knew he had an attraction to other males? I think there are folks who would say he was "really" a gay man.
Decent people wonder if they would be decent in harsh times, or whether they would easily slip into violence and thievery during societal breakdown. We pray we never have to find out. We might pray also that we never have dementia, which would reveal much of what has been on our minds all these years. (I call that "not enough fence to keep the sheep in") Is that, though, the real self?
CS Lewis admonished that we might be giving ourselves credit for cheerful disposition that is largely a result of good digestion, or focused discipline that is due more to our parents' efforts than our own.
We draw a line somewhere, and I don't know how consistent we are. Interesting to contemplate which is the real self among our friends and relatives.