When it comes to neutering, trust your instincts. If you talk to a vet, they are always inclined to talk you in to neutering. I think the benefits of s/n is more for female dogs than male dogs. As long as he is happy and you don't mind him marking, I don't see it being a problem. People always say neutering is the best but it is not so true if you look more in to it. I am very responsible with Pao and I NEVER let him contribute to reproduction and I just wanted the best for him in terms of health and that is also why he gets homecooked food. As for hormone frustration, he really doesn't have one. He is very outgoing and happy go lucky guy.
If they are aggressive maybe it will help but there are also dogs who were originally sweet and became agressive after being neutered. You just never know. I am a chicken too and I have been holding off neutering my Pao eventhough I get the talk every single year at the vet. If they could give me something solid to believe in showing benefits neutering the male dogs are more than the risks, sure I will go ahead. I had a dog that were neutered and he did became very very obese even with exercise and less food
.
Mine doesn't even mark in the house, doesn't hump and plays well even with other un-neutered males and he actually enjoys playing with them a lot. The only dogs he doesn't like are jumpy puppies.