Tatum was pretty calm from the very beginning (she's 1.5 yrs old now). When she plays, she can get rowdy and wild but for the most part is still very calm. Now that we have a new pup, Australian Shepherd, she plays really hard and wild with her and can go that way all day long but it's like the minute she walks back inside, she puts on her calm demeanor. Stormie (the new pup) is all "outside dog" (we're in the country) so when we open the door to let Tatum in, it's almost like she looks back at Stormie stopped at the threshold and puts her nose in the air like "ha! I get to go inside.... you don't!". Then as soon as she's inside, she's all cuddles and calmness. But I hear I have one of the minority personalities!