Personality changes with the POD at conception are more plausible than any other POD. Personality changes with the POD at birth are just as plausible as any other POD, for example a battle going a different way or a disease outbreak that didn't happen.
how does one get a personality change at birth? Scared by a particularly ugly midwife?
Bruce
PS - personality usually develops and solidifies by one's 20s: with a different childhood, adolescence, a different adult is certainly plausible, even likely. I was talking about major changes past that age.
Personality change at conception is "someone else with the same name."