Leonard Nimoy made quite a few appearances on The Simpsons. My favorite appearance of his (which i think was his first) was the monorail episode. Never got much into Star Trek, but it's sad nonetheless.
However, a friend of mine shared a story about Nimoy. Thought it was pretty damn interesting.
I always heard Shatner was a butthole (but then again, that was on the internet, so who knows). Wonder if Nimoy really was a nice guy or if my friend's uncle is just a dumbass. Regardless, RIP.