Thought of some more after reading through this thread.
Don't get a Toller if you don't like to be stared at. Not all stare, but many do. Intently.
Don't get a Toller if you like to move about freely without a dog leaping to their feet in anticipation of something. They watch your every move.
Don't get a Toller if you want a dog who will protect you. A Toller will bark, and then find a safe place, haha.
Don't get a Toller if you like your environment to stay clean. Most find great fun in getting dirty!
Don't get a Toller if you don't want a dog prone to sensitivities. Vaccine reactions are an enormous concern in the breed, and I've also known many with terribly sensitive stomachs as well.
Don't get a Toller if you don't enjoy saying "Nova Scotia Duck Tolling Retriever" a billion times while out with your dog in public. You can never say it just once -- strangers always seem to follow with "A Nova Scotia what?"... and then you have to repeat. If you just say Toller, they ask "what's that?", haha.
Don't get a Toller if you don't like noisy dogs. Mine aren't barky, but they definitely have an assortment of other strange noises! Most of which I find endearing, but many people don't.
Don't get a Toller if you want a dog that lives to please you. They definitely like to make you happy, but they also need to know how something will benefit them.
Don't get a Toller if you are not prepared to socialize it like you wouldn't believe when it's young.
Don't get a Toller if you're wanting an easy dog. They can be very headstrong, and love to think for themselves!
Don't get a Toller if you like a dog who learns things repetitively. They get bored with repetition, and tend to come up with all sorts of creative ways to do things!