Re: Lt. Kim
It would have made more sense if there had been a different Ops officer when Voyager initially left DS9, and Harry was stationed in some auxiliary station on a lower deck. Then the Caretaker's beam grabs the ship, the Ops officer is killed along with all the other guys, and Harry winds up being the only one qualified who survives. It might have added to the character a bit if he wasn't fully prepared for the job right out of the box, and could have accounted for some of his nervousness.
Curly: Moe, Larry, the cheese! Moe, Larry, the cheese! (Horses Collars, 1935)