If Nimoy emoted every week as he did in Return to Tomorrow with the big smile and the broad style---nobody would have been throwing themselves at him. The stoicism/aloofness was what made women attracted to him--not his looks.
Thats unfair. He was being creepy in that episode.
At least give us the Medusean or Spore episode where he wasn't being a meglomaniac god-like creature.