Re: Does Star Fleet not run psychiatric examinations on its recruits?
I'm less concerned with Barclay's idiosyncrasies than the alarming rate that the captains of Constitution-
Class starships tend to go nuts despite the fact that they are supposed to be "the best of the best", and that many Admirals seem to become corrupt from the moment they gain their rank insignia!
It's been shown that Barclay is indeed a very capable officer in his field, it's just that he'll almost certainly never reach command of a starship.
"A perfect organism, unclouded by remorse, or human illusions of morality." - Ash, Alien