Okay, I just realized how Jack is really similar to his dad. It's not about personality, of course; I’m talking about what he went through. Okay, just take a look:
-He lost his mother when he was a kid: just the same as Sam & Dean.
-Lost his soul: just like Sam in season 6.
-Lost his grace and was on the verge of dying: like Cas at the end of season 8.
-Have a bad bio dad but then got the amazing adopted dads: just like Sam & Dean with Bobby.
-The person he loves makes a deal to save him and then dies because of it (Cas makes a deal with The Empty to save Jack): John makes a deal to save Dean, and Dean makes a deal to save Sam.
-Dying and coming back: Literally the same as all of them.
-Kill an archangel (Michael): just like Cas (killed Raphael).
-Revive a person from death (he saved Cas in season 13 and season 15): Same as Cas when he saved Dean from Hell.
-Become God: like Cas in season 6 (well technically Cas is not as strong as Chuck but we still call him Godstiel so…).
-See himself as a freak or monster: same as Sam in those early seasons.
-Have people think he is just like Lucifer, then prove them wrong: again, the same as Sam (season 5, when Gabriel says the boys are similar to Michael and Lucifer).
-Good intentions but bad choices (season 14): same as Cas in season 6, both of them just wanted to help but chose the wrong way.
-Always a Nephilim, never a kid: same as Dean (always a soldier, never a kid), Dean always has to fight, to become a good soldier to make his dad proud, to protect Sam, he never had a chance to live as a kid.
This is so crazy when they literally put a two-year-old kid went through all the trauma that TFW had for over 10 years.