Watching the season 3 episodes where John was twinned, and seeing how different he is when he has Aeryn and when he doesn’t. Talyn-John showed Aeryn his star charts, told her he always names one particular star after her because it’s his guide and his one constant. That John wasn’t overly obsessive about wormholes, and I don't think he was tortured by Harvey.

Moya-John, the one without Aeryn, was obsessed with wormholes and getting home, always had Harvey in the back of his mind, was a bit more insane in each Moya episode, and there was even an episode where Pilot made everyone take a vacation and get off the ship for a few days bc their bickering (John, D’Argo, Jool, and Chiana) was driving Pilot and Moya nuts. Like, I think even though John and D’Argo are good friends, being with each other 24/7 (when John would normally be spending more time with Aeryn) showed them how much they could actually get on each other’s nerves.

It just goes to show how Aeryn grounds him. The reason why he puts her star at the center of his charts. When he’s with her he still wants to get home (and take her with him), but it’s not an obsession. The only thing Talyn-John really cares about is that him and Aeryn with each other. He doesn't have all of these other things in the forefront of his mind withought much of a way to cope (without Aeryn) like Moya-John does.