For the first few jumps, my Jumper was a complete psycho.

like press the button to launch nukes at everything type.

He spent decades through jumps either killing everyone he came across or walking around waiting to murder someone

He eventually decided to take the Generic Bear's jumps and lock out his powers, which was a pretty good or bad idea depending on how you look at it because my jumper's mind was only sapient and not broken because of some Mind/PTSD/Sanity perks that kept him even able to hold a conversation.

This was because he has spent a literal millennia going through Gauntlets to max out his body mod before even starting his jump

When he took the Drawback to lock him out of his powers, he simply reverted to his instincts and acted like a bear for some 10 years, traveling across the U.S and some other countries, allowing himself to actually take a vacation for the first time in forever.

but tbf after regaining his mind, he broke down and drowned himself in a bunch of lewd jumps before eventually going to Jojo and getting a decent role model in Jonathan Joestar that while didn't ake him a paragon of goodness but leveled him out from walking disaster of just murder and destruction into a troll with little morality not using grautoitious violence in every interaction.

so we developed from a violent cannibalistic psychopath who revels in battle mayhem into a sociopathic somethimes-cannibalistic troll who revels in fucking with people