Actually I think GR's account for the largest number of bites by breed - but they don't do much damage.
The problem with large, powerful working breeds is their capacity for destruction. Defenders of aggressive breeds have a point about the responsibility of the owner, but it's tough to ignore that the dog is an independent entity perfectly capable of doing whatever it chooses.
If a lab bites you, it's just annoying. Not so with a Rott, Canario, or Pit Bull having a bad day.
If you choose to keep "aggressive" breeds as pets or guard dogs, that's great, but like anything else you will bear the responsibility of your dogs misbehavior - and the "tougher" the dog, the greater the potential consequences.
I was attacked by a lab and spent four days in the hospital following a three hour emergency surgery. That was more than "just annoying".
Mrs. Ches
By definition, a dog bite is described as teeth touching skin. In that case, my golden bites me all the time. They have very 'soft' mouths (they can carry a raw egg in their mouths without breaking it). When he gets really excited, he gently takes my arm and leads me to where he wants me to go.