There's nothing better than seeing the sheer excitement a dog shows when you come through the door. My dogs freak the F out when I come home after not seeing them for weeks and I absolutely love it.
*disclaimer: the dogs I'm referring to are the dogs at my parents house. I don't leave my dogs home, unattended, while I'm away for weeks.
Ps. If you haven't read The Art of Racing in the Rain, you need to. I cried on every other page. It's from a dog's viewpoint and it is so beautiful to see the relationship a dog has with his owner. Loveee it.