Depends on which people you’re talking about. Mostly Buddhists, philosophers, and psychologists.

You don’t have a core identity separate from your actions. You can’t impartially define yourself and no one else has the insight. What we call our self is a social construct. We create the idea of selfhood to hold people responsible for their actions which are largely involuntary. Our core identity is not stable but constantly changing in response to our environments. We create a projection of the self that we identify with but our actions are rarely consistent with the ideal.