If you take a few years off from it and come back, you'll notice little details you missed before. In "The Menagerie,", for example, when Kirk and Commodore Mendez leave the latter's office, we see a yeoman in the front room jump to her feet and stand at attention. Roddenberry, Gene Coon, James Doohan, and others of the cast and crew had actually been in the military, and they knew how it was supposed to operate.
