Is it important to think about your childhood and talk about it in therapy, or is it better to not look back and just talk about current stuff? This of course for someone with a not great childhood. Or does it depend on how good or bad your childhood was?

My childhood was not great as both parents are arguably personality disordered individuals, however I know many people have way worse traumas than me. No one has ever been particularly keen for me to talk about it at all, and as a result I never have. Everyone loves to say how no ones childhood is perfect... Now I've forgotten a lot about mine anyways. But, my mother for example was hospitalized in a psych ward several times. She had hypochondria and was always "dying" of some health crisis or another. She would go on super mean abusive streaks then flip back to being overly loving. How do I talk about this or do I not bother?