We have a dog that pretty much does nothing all day... She will literally sleep 22 hours a day and only wants to go out 2 times a day. BUT she is a killer, apparently a bird landed in our yard.
I've had 4 Rottweilers over the past 20 years they were all great dogs. ( 3 were rescue dogs, one was bought for me when he was a puppy )
On the other hand, I HATE Doberman Pinscher's, they are neurotic assholes.