I don't have a dog but I have always wanted a dog. When I was a kid we briefly had a Rough Collie, then a Whippet lurcher, both were the sweetest dogs ever.
I'd love a Rough Collie one day. My favourite breeds are the sighthounds, especially the Borzoi. Small dogs terrify me so I don't see myself ever having one of those, although Papillons seem cool. I would never get a terrier. I LOVE the giant breeds but their health issues and short lifespans mean realistically, I would probably not choose one of those, if I were it would have to be a Newfoundland. I like a lot of other breeds too, but I always come back to the Rough Collie when I think about the kind of dog that's most well suited to my circumstances.