They are awesome dogs! Gentle giants, friendly, but will protect their folks, be they 2-legged, 4-legged, or winged! I loved mine, even though they barked at everything, and their coat requires upkeep. They are an excellent farm dog.
While I would never say an Aussie would calm down enough to abide a sedentary life, 1 year old is still pretty young; probably still has lots of puppy in him! :) :fl
I've had two: a blue merle (deceased), and a black tri, still with me. Got them as pups, about 18 months apart. Tex was a totally laid-back dude, sweet as he could be. He had health problems starting at age 7 with seizures, and it just snowballed from there, until I had to put him down last...