Originally Posted by That Metal Beastie
It was both intentional and not. The emotions Spock displayed early on were certainly written and performed that way intentionally. And yes, it was decided a little later he showed no emotions because Vulcans had no emotions. Then later it was decided that Spock, being half human, did have emotions but with rigid Vulcan control surpressed and controlled them.
And then later it was shown that in fact all Vulcans had suppressed emotions. Ah the evolution of Trek and its correction or expansion of all things 'canon'.