Mine is a) Spock b) Kira Nerys probably the hardest job of them all with Cardassians and Ferengi and other nefarious types always entering DS9 c) Chakotey most able to become captain at a moments notice and most old school Star Treklike character of any of them d) Worf (Defiant) because he is Worf and no one would mess around serving under him e) Riker probably had the easiest job as first officer. Update I never got into Enterprise so I will leave that to all of you.