It wouldn't be Sadie. She qualifies for the "most hyper", or perhaps even "funniest". Also one of the smartest dogs I've had. She's nowhere near the "best".
We had a wonderful German Shepherd, Chip, that would perhaps come in second-best; and the first rat terrier we owned was such a good dog, we went through half a dozen others trying to replace him. We finally figured out that couldn't be done.
Our mongrel Suzy, though, had it all: Looks, personality, loyalty. She loved life and she loved people. Cliff's youngest sister sent her our way because her then-husband hated the dog; Charlene said, "If she stays here, she's going to die."
You'd think, since she'd been kicked, beaten and abused by Charlene's husband, that she'd have had a mistrust of humans, but she never showed the slightest trace of that. Perhaps her joy at being freed from the confines of a pen in the city overcame all the baggage from her past.
Suzy even knew where our property lines were, and wouldn't cross them unless she was in pursuit of a rabbit or squirrel. Unfortunately, it was such a pursuit that got her killed.
If there's a doggie heaven, Suzy is there.
Take some time to think about the best dog you ever had; what made him or her the best? Got pictures? I'd love to see them.