I'd be the kind of captain who really relies on his senior officers for support and advice. You rarely get the chance to interview and decide on who those people will be. Stuck on a starship with a "lesser" crew would be a major disappointment for me. So, being a captain would have to be a conditional thing in my mind.
In any case, I tend to be a better follower than leader. My mind works a little better when stress is light to moderate, not moderate to intensive. So... I'd rather be an XO and advise the captain. As long as that man is NOT Jellico.