Do you have the best dog ever?

I think my dogs are great. Who doesn't? I have four. One, a German Shepherd, is very special to me. I spent months researching breeders. I finally found a breeder that the whole family was satified with. We then spent the next year and a half on the waiting list. By the time I got my puppy I felt like I had been bonded with him for about two years. I was 17 and a junior in high school when he finally came home. I did everything right with this dog. I socialized him like it was my full time job. He and I started cles together almost immediately. He was, for the most part, a dream to train. I went to a very small, private, college prep high school. I was actually able to convince them to let me bring him to school with me during part of my senior year. He was so good, he would just lay next to my chair. As he started maturing into an adult we dabbled in many dog activities. Agility, herding, search and rescue, therapy dogs and of course obedience. He and I have such a bond as a team that I understand him better than I do a lot of people in my life. He is now, at 11, considered old for a GSD. I've become ultra paranoid about him. He is in fantastic health. Other than he is quite grey in the muzzle you'd never think he was older than 8 years. I'm always wondering how he is doing medically. He has blood work done twice a year and I have an ultrasound done then too. I jokingly tell people that I should probably go on antidepressants now, so that I will be better prepared if something were to happen to him. But it's really not a joke. Even though I have other pets that are a huge part of my heart, when he goes he will be taking the majority of my heart with him. I will always have a strong bond with dogs, but I'm a bit worried that I will never bond like this again. In a nutshell this dog has been the definition of man's best friend.