After college, I had got my first apartment and happened upon an a Japanese Akita. They are huge dogs the size of, if not bigger than, Rottweiler and hairy like a Husky. The second I got him, I neutered him and my vet thanked me for doing so. He said neutering reduces the possibility of many ailments later in their lives as well as reduces their aggression. I did the same when I got a female Japanese Akita from the pound. I never wanted to breed but from everything I read back then, pre-Google, neutering/spaying was the way to go. They were very pleasant animals to be around. Cant say the neutering made them the calm, gentle animals that they were but I'm sure it didn't hurt.