9. Close Quarters Combat Training
A legendary captain needs to know how to crack some skulls, or skewer them as the case may be. Yes, Starfleet regulations restrict the Captain from participating in away missions, but we all know the true badasses laugh in the face of this rule. Sometimes a guy (or gal) has to throw a punch or two. Sometimes a captain gets selected by T'Pau to be her champion and he has to face off against his first officer. The point is that a captain needs to know how to handle himself in these situations. One never knows when the captain is going to have to get his hands dirty. Of course, if you can study a super old school, archaic style like fencing, all the better.