Janeway. Who wants to get lost on the far side of the galaxy and then repeatedly told EVERYONE ELSE IS MORE IMPORTANT THAN MY CREW for the foreseeable future? Seriously, there were at least seven instances where she could have led the crew back home in an instant (Q, the Caretaker, wormholes) and she always was "nah, we'll do this some other way." How there wasn't a mutiny or seven I'll never understand.
Also, no opportunity for promotion...