Neelix was annoyingly nice, Tuvok was another dull Vulcan, Tom Paris was an arrogant douche, Harry Kim was that annoying puppy dog that followed you home and Janeway was a cold war criminal. The Doctor though? Sure his bedside manner was atrocious, his vanity was large and he could be a real dick but given all bull shit he was putting up with on Voyager he was often the perfect counterpoint to all the insanity and stupidity. He even had to put up with a neurotic hologram of Andy Dick for an entire episode. They wouldn't have made it out of the Delta quadrant without the Doctor. So the Doctor was the best part, right?