Thankfully I don't see much of that.
If that is common, I'd advice to build character personalities around clear and even somewhat caricatureish archetypes.
Then you can add nuance as you go along,* but the archetype remains as the fall back.
* Easy way to add depth is demeanour/nature that was used in many White Wolf games. Your "public persona," how you present yourself and want to be perceived, versus your true self, which you might wish keep hidden but which occasionally slips though.
(I also do not remember what this thread is actually about, as it is months old but someone revived it, so if I'm repeating myself or my comments seem like non sequiturs, that's why.)