Never closed or turned off anything after he finished using it. Like cupboards, drawers, lights, the front door, the refrigerator, the shower, the oven
Somehow sustained himself mostly on soda
On the off chance he tried to cook something he'd put a sausage on a pan and forget about it until it was charcoal welded to the pan
Zero pain tolerance. Would scream bloody murder because he just pinched his finger on his glasses hinge or something
Spent all his waking hours screaming at League of Legends
Stole my laptop. When I went to get it back he had a stack of broken computers, and he'd just put a new one on top when one broke. My laptop was just the latest PC to play League
He had a bunch of bottles of old apple juice around his desk. Realized it wasn't apple juice
Never washed his dishes. Tried for months to get him to do any sort of house work. Eventually I just put his dishes on his bed. He just sort of pushed the pile of soggy dishes aside and slept with them. He probably still sleeps with them to this day.