Our two RES have the standardly shy personalities. They always jump off their basking area or hide when we enter the room (unless they detect food, in which case they come out of hiding to beg).
Well, we went on vacation for a week. My mother in law fed them for us while we were gone. When we got home, we went to say hi to the turtles. They didn't hide at all. Lazurus (the smaller one) came right to the front of the tank and stuck his head out at us. Lil' Dude climbed up onto his platform and stuck his head out, too. I guess they missed us 
That was our one and only greeting. They're back to hiding again 
