My favorite moments are usually subtle little things, not big events.
In Survivor: Borneo, it was Colleen talking about Rich and saying, “It’s like making a deal with Satan himself.”
In Survivor: TAO, it was Kimmy and Alicia cat-fighting in the background, and the camera slows on Mike Skupin, who’s shaking his head ever so imperceptibly, as if to say, “It’s like this all day long.”
In Survivor: Africa, it was Brandon asking the final 2 who was least deserving of the million dollars, to which Ethan Zohn answered, “You.”
In Survivor: Marquesas, it was FedEx pilot Hunter Ellis, offering this gem during his confessional after being voted out: “I was camping with a bunch of knuckleheads, though, and I’ll tell you that to your face when I see you again, so don’t worry about it. And – I will phone the Red Cross and let them know where you guys are so you can be airlifted out of there after you die of starvation and dehydration after the next couple days.” 
In Survivor: Thailand, it was the look on the fellow contestants’ faces during the “video from home” segment, when Brian Heidik’s home life was revealed to be…much, MUCH more elegant and well-off than their own. Whoops.
In Survivor: Amazon, it was anything else on television at a competing time-slot.
In Survivor: Pearl Islands, it was Johnny Fairplay. How this guy didn’t get selected for All-Stars is beyond me.
And, in All-Stars:
My favorite moment was thanks to Colby Donaldson. When he quietly read the riot act to Shii Ann, it went down as perhaps my 2nd favorite moment ever. You know why? Because he’s RIGHT.
“You can go a long way in this game by playing under the radar. But that’s not playing. There’s a lot more to this game than writing a name on a ticket.”
Truer words haven’t been spoken.