I'm a sadistic fuck that's been made to have the caring range of a rock due to childhood abuse
I'm fine being that way, it's just not conductive to maintaining relationships. Been there, done the whole 'be yourself bollocks' - the results were shit. Pretending to care far more than I do, and constantly suppressing the sardonic and vindictive tendencies has been far more pleasant
'just tweak core aspects of your personality' is exactly the opposite of being yourself
All of us have tendencies that are better repressed. This is why we have a brain.