Later, perhaps, but Kirk was often less certain and more conflicted in the early episodes -- but his training and need to appear confident as captain often took precedence. The more personal moments between, say, Kirk and McCoy often revealed his inner conflicts. A wise move was to return some flaws to his character for Star Trek II, which made the drama much more interesting. By contrast, I found nearly every character in every later series to be colorless and plasticky, in part because of the boring, odd-looking actors playing them but also because of the conception of the characters.
