A friend once told me:”You do good thing, but always in a way to make sure that everyone will still hate you”. Kind/cruel? Hard to tell... self centered probably.
Characters are extensions, so it’ll always be easier for me to portray characters close to my logic, and more fascinating and challenging to explore characters that are coherent, yet completely different from me.
So what I do, is I generally have my main character close to my own mental logic, and get a second role with traits I notice in others and that I don’t understand, so it keeps me engaged in my work and forces me to study that, to question and improve my writing...