Last rejected takeoff - Nairobi in 1990 on a BA 747-200. Got close to take off but not quite. Two hours on the ground and then finally off to LHR.
Last go-around: Jersey in January. Sitting towards the back in an aisle seat. The person in the window seat looked white as a ghost. I was fine. They asked me to talk to them about anything but what had happened until we landed to take their mind off it.