I'm not much of a trekkie, but Leonard Nimoy's loss affected me quite a bit. To me, he was more the star of the show than Shatner ever was. His appearances in the most recent movies were a joy, much better than everything happening around him. It's what Nimoy brought to what one might think would be an unsympathetic and distant character that made us relate to him. Perhaps we'd all like to be more in control of our feelings, and perhaps we all struggle with them occasionally.
Nimoy played Spock for decades, but I never felt the integrity of the characterisation was violated, even though he sometimes did lose control when there was good reason. In contrast, Zachary Quinto's Spock felt to me like a whiny brat who was barely keeping it together pretty much from the beginning. Quinto dismantled in one movie what Nimoy had built over half a century.