As news of actor Leonard Nimoy's death spread today, fans mourned the loss of the "Star Trek" star.
Nimoy, who starred as the emotionless half-human, half-Vulcan in the TV show and several films, died at the age of 83, but to Trekkies, his memory will live on.
"R.I.P Mr. Nimoy," wrote a "World News Tonight" fan on Twitter. "You will forever be remembered."
ABC News asked readers what made Nimoy's Spock such a beloved, iconic character and to share their favorite memories.
From his appearance to his demeanor, here's what they said.
@WNTonight I loved it when he raised the one eyebrow. Just loved him in general.— Karen (@rettak77) February 27, 2015
@WNTonight I first saw Star Trek during its first run in1967 as an impressionable 13 yr old. Impressed me for a lifetime— nancy mcintosh (@nancymac23) February 27, 2015