I don’t think his orientation matters, as long as he can be convincing as Spock. He’s a good actor, IMO. And from everything I have read, he doesn’t swish around lisping “i’m here, I’m queer, get used to it”!
He was in both seasons of American Horror Story and he killed it! Literally in some cases.
My problem is, once I know an actor is gay, I have a hard time not seeing him as any thing more than "the gay guy" in whatever movie he's in. Take George Takei, Sulu from the original Star Trek. I never had a problem with watching him until he came out as gay several years ago. Now I can't watch the orginial series without looking for gay mannerisms in the actor, which tends to take me out of the story.
He was also pretty good in Heroes.