I like to keep several careers going and with each captain assume a different personality. For example:
-one who does everything by the book (patrol assigments, contact reports, ship identification) and doesn't take any unnecessary risks
-one whose only goal is tonnage: lets small ships go, drives the IX, 1 torp = 1 kill :hmm:
-one who's (maybe too) aggressive, takes chances, plays fast and loose with torpedos and fuel, raids harbors when nothing else is going on