By nature I'm a sedentary person; in a traditional tribal setting I'm pretty sure I'd be sitting in the shade all day chewing leather or weaving or something. Buster (a lab-dalmation mix) keeps me active. I walk him every day, and often go on long hikes with him on the weekend.
We also eat pretty much the same way, except I cook my meat, and seeing his health and well-being is a great spur and reminder to me when I feel like slacking. In fact, the only time he gets (slightly) porky is in the fall, when he gorges himself on the fallen plums in our backyard (he's even gotten a little inebriated occasionally as they ferment, so I have to really keep an eye on him when he's too quiet in the backyard). His coat is gorgeous, and his teeth are still sparkly white at almost four years old, an age when our friends' dogs' teeth have long since turned yellow and brown from kibble.
On the more woo side of things, I sometimes feel he teaches me about what's important in life. He's a pack animal and really doesn't like to be alone for too long, and I can be quite reclusive, so he shows me the importance of contact even when I don't feel like it. And he has the canine gift of living completely in the moment; he doesn't brood on past insults or engage in pointless arguments with invisible dogs in his head. But he's not completely clueless about planning; he buries bones to rottify, forestalling current gratification for later delectation. But he's not obsessive about it; sometimes he gnaws the bone right away.
Overall, I think he's got a pretty good handle on living life, and I hope someday I'll be as non-neurotic as he is.