How does your childhood have to do with your current identity?

I’m in the midst of “finding myself” you could say…. and I’m wondering how important childhood is to your present identity? how do they connect and should it be important to who I am today?

I mean people change for a reason of course so i am wondering, would reminiscing about my past (in depth) to help understand who I am be pointless? Please all answers appreciated. And I am a 19 year old male. thank you…