I think I get more positive comments than negative in regard to all of my dogs, but I definitely get more than my fair share of negatives too.
Dobermans: I am pretty sure the first thoughts from most people regarding Dobermans are negative thoughts. The worst is when people are petting my dogs and have no idea what a Doberman is, and they love my dogs, and then they ask the breed and the people leap back like I electrocuted them. Because apparently my friendly dogs might attack at any second as soon as their breed is known.
Tollers: I find that non-dog people love Dance and think Tollers are super cute. I've yet to have met a dog person who likes the breed though, except for Toller people. Most dog people list a thousand things they don't like about the breed and say they can't stand them and don't understand why I like them so much. To each their own! They can certainly be a quirky breed, and sometimes in a negative way, but I still think they're pretty awesome and a nice Toller is an incredibly fun dog.
Aussies: Yes. Yes, yes, yes. Most people seem to strongly dislike Aussies. They're pushy and in your face, and most people also have the impression that they're super hyper and need to be constantly busy, and many people seem to have been bitten by an Aussie (in fact, I was as well oddly enough). Thankfully though most non-dog people don't recognize Journ as an Aussie (cause she isn't blue merle), so until I tell them, people just think she's a very exuberant cute dog.
So, in short, I appear to have three breeds that are not very well liked generally haha. Oh well, I love them. Good thing there are plenty of breeds to choose from for everybody. There are breeds I don't like too/wouldn't want to live with... though I usually try not to tell their owners that.