Re: Which Captain was most lenient on their underlings?
For some reason I find Archer to be one of the most realistic military commanders of the whole bunch. Picard was more of the distanct professional but he did take the time to mentor his JO's. Kirk seemed kind of snippy to those outside of his senior staff. (If I was told to "snap to it mister" it would probably piss me off.) Sisko was a lot more patient but he had some high quality ass-chewing sessions with his crew.
I think Archer is the perfect middle ground amongst all of them.
Searching for something, a million miles and a ways to go.