Boxers arent dumb, theyre bulldogs so that mindset comes with the territory. They can be hyper, but what puppy isnt? As Gary stated, its about how you raise them. Some examples are still quite civil. I know of a pair of littermate males who were sent to in house training(different times) at a facility I and others here frequent, and it took 3 days for the kennel staff to be able to approach them. I mentioned boxer as soon as I read corso in your post, because theres a chance youll end up with a Boxer and not even know it. Good luck with whatever you choose