I think there are a lot of Batch idiosyncrasies and odd ideas that they in all their insular codependent glory are completely unaware of but right now my three favorites are
They all think Wrecker is an insanely heavy sleeper. He’s not, he’s just half-deaf and not quite so high strung as the others, and also Sergeant Super Senses makes everyone look like a coma patient by comparison.
They all think Hunter is hysterically bad at math. This is part unawareness of exactly how rigorous the Kaminoan commando education requirements are, but mostly it’s the whole “engineer, bomb tech, sniper, cyborg hacker, and… knife guy” effect
They have a complete and utter lack of the concept of privacy for everything ranging from personal space to secret-keeping. On Kamino, they were always being monitored (bad), and Hunter is always listening (good), and the Marauder is tiny, and they’ve never been separated for more than a week or so at a time since they first met. This is actually a TechPhee Problem that she has to resolve early on when she tells him something personal and two days later somehow Hunter knows it. And she realizes that she has to firmly specify in the moment if she wants to override the whole “if you’re telling one of them you have to accept you’re telling all of them” thing and there does come a point where she realizes if Tech decides it’s important for the others to know, he’s going to tell them anyway.