I would estimate that half of Shatner's vote is for his toupee which rightfully deserves a slot of it's own. That thing clung to his head tighter than a "insert favorite 3rd world country here" pole dancer.
There are two lines from other shows that sum up Kirk's leadership.
From Coupling s1e5, encouraging his friend to get the girl: "Captain Kirk, it's time to shag the alien's girlfriend!"
From Lost, after Locke has to have the term "red shirt" explained: "Sounds like a piss-poor captain to me."