My male RES gets really upset if he's not allowed out on a regular basis. He follows me around and when he gets tired he goes under the couch and sleeps. When I brought home the rescue turtles I had them all out running around while I set up the tanks and my turtle wanted nothing to do with them! He sulked under the couch until they were all in their tanks and then he came out of his hiding spot.
I've had rescues for awhile now and I keep them in one room so they're not all over the place. I've tried to put my turtle in there a few times but he just sits at the door looking at me, it's like leaving your kid at school! So I have 17 turtles in one room of my house and my loner turtle has his tank set up in the living room. His territory consists of the entire upper floor of my house and he has sacrificed one room for the other turtles but he guards the rest of the house like it's his kingdom. Luckily my cats have no interest in him!