Me Me Me!
Only because keeping track of crew is a pain. I like to keep my watchmen separate from the gunners, and the repair men go off to their space as soon as we set sail.
I figure a crewmember would be assigned to a task, might as well give him the qualification now so I can tell them apart. I understand becoming qualified in a department was time consuming process, but considering how screwed up crew management is in SH3 (I run no fatigue model), it's the only way I can do it.
Poor Joachim there is the cook.