I can't be the only person doing some "roleplay" and enforcing certain rules, even through it's not restricted by game mechanics to behave otherwise.
So, what rules you people are using, if any?
My typical to-go list for any difficulty (although I rarely play on Superhuman, I don't think it's too fun):
1) Never use any item that wasn't researched (no bootypedia entry). What if you turn a gun wrong way and end up shooting yourself?!
2) Never try to fight a one-sided battle. This is about not cheesing it out with grav harness vs melee enemies. As long as enemies don't even have an option to retaliate, it's boring and not pirate-worthy.
3) Never "power-level" with any kind of tricks. Such as repeatedly stunning and un-stunning enemies to train weapon skills. Well, unless that particular enemy pissed you off BIG F*CKING TIME, but then it's about having your rightful vengeance, not about power-leveling.
4) Never kill a civilian, unless you can't help it (someone went berserk or whacked a bit too hard with that bat). They're wimpy and not dangerous anyway, killing them is just admitting your weakness. Yes, this includes situations when a civvie tries to burn your gal with an iGun.