Since I am a cook, mine is food related..

I go into a panic when I see food uncovered!! Even during serving times, once you are done, recover the food!! Those boats vibrate constantly and stuff is constantly falling from the celing, the movement of the boat is constantly blowing stuff from the tow we are pushing, back to the boat, people sneeze or cough, loose hair and you better NOT grab food with your hands!!

Opened, unsealed food in the cabinet or pantry so the next person who grabs it, slings it everywhere and left open for bugs to get in.

Lids not properly screwed back on jars, mayo, pickles ect.

CLOSE CABINET doors when you are done in them! This comes from when I was a child and someone left one open and my Mama walked into it, I can still see the whole side of her face bruised and swollen.

PUT things back where you found them whan you are done!

The uncovered food thing just about throws me in a panic, the other things are just aggervating...