Surprisingly, this is really hard to answer XD I like all canines really. Wolves are simply awesome with their connection with mythology, folklore, their wild nature, beauty and voices. Foxes are like the definition of cunning; their adaptability and the fact that they are actually the most widely spread canine across the world is really something to marvel at. You can't not admire dogs. They're just such loyal and loving creatures since they teamed up with us humans in our endeavors as hunters thousands of years ago. Not to mention the fact that they are kind of like the thing that connects humans to wolves, since there's a lot of evidence that suggests dogs may well have evolved from wolves.
I'm sorry, I really can't decide on this one. They're all just too good.
Also, as many others have previously stated, hyenas are not canines as they do not belong to the canine family; they belong a different family of carnivores called Hyaenidae which actually has a closer biological relation to cats than dogs.