I love dogs...cats not so much.
I agree with that. Dogs have been associated with humans for so long that they have become uniquely attuned to our behaviors and make great companions.
Yes.  Dogs seem to love while cats seem to tolerate.
The dog was the first ever species to be domesticated and has been selectively bred for more than a millennia!
Wow.  They seem to have been man's best friend for a long time.
Research has even shown that dogs now have mutations to equivalent genetic regions in humans.
That's interesting.  Never knew that about dogs.
Dogs can perform many roles such as hunting, herding, pulling loads, protection, assistance, and companionship.
My dog just plays, eats and sleeps.  
And that is good too. They are "man's best friend."