Yeah, Black Lab!
I thought it might be figured out quicky, but one never knows. I couldn't think of anything good off the top of my head. My parents have a half black lab/half border collie (my avatar) and that gave me the idea. She has a very sweet temperment (when she isn't in mooch mode that is!) and looks and behaves like a black lab.
Soooo, the answer was right here on this page!
Congrats fealola. Your turn!