Its not what we may think - chasing home or the things of home or relationships or people or running to escape our past or anything that comes even close to looking like our past.
Happiness for me is watching Ozzie as he feels safe enough to run and play and explore! Its accepting the responsibility for another being that has allowed me to mostly forget my dissatisfaction and depression and get past a lot of my own crap and all that has allowed me to openly enjoy watching his happiness.
Wouldn't it be kewl to have a close personal relationship develop the same thing?!?
PS it's really hard to get a good picture of his playing to share. :(