As the title above says if you think about it, his struggle of wanting to find his identity is like a ordinary teenager. The powers he put into himself like Orochimaru, Karin, Suigestu and Jugo's represent trends that teenagers go through to find their true selves by the time they are 18 or early 20's. This is all my opinion of course and something I wanted to share to you all
Hope you liked my little observation. I hope someone else thought the same about him or other characters lives which represent something in real life.