Dogs provide comfort, and companionship, and love. From the tiniest Chihuahua to the largest Great Dane, they're like little space heaters in the winter and your best confidantes when you're sad and no one gets it. And even when they crap in the dining room, you can't help but love their little, fuzzy selves.
I have two pit mixes that are like my kids. I would sell my house to keep them healthy, even though they drive me nuts.
So, perhaps we can make our best friends, although some may be dumb as a sack of hammers, super useful. If I can teach them to open the fridge and re-load, I would see them in a very different light. "Sit" is pretty tough, so I'm not holding my breath.