I agree that most pets should be spayed/neutered but don't think people should necessarily be frowned upon for not doing so. Its a little frustrating though, with an intact male, to be lumped into a group of "irresponsible owners" who are "lazy." I can't tell you how many random people scuff at me or try an lecture me. In his case, he has never had issues with being intact. He has always LOVED dogs (male, female, intact or not), never humps, doesn't spray scent, never aggressive etc. I also watch him like a hawk, he hasn't gotten away from me in 6 years (he did a couple of times get away from my parents, but no longer lives with them). If he ever did run away I am almost certain he would be killed by a car (he doesn't look when he runs) before he ever got a chance to mate.
Anyway, I will always get females spayed, I think there are too many positives not to. But when researching the benefits of getting my little guy neutered the pros didn't outweigh the cons. I think neutering will always depend on the individual dog for me (unless they are already neutered in which case its not an issue). I've read a few other studies such as this:
http://www.gopetsamerica.com/dog-hea..._benefits.aspx
and for my dog (who is on the lazier/I'll eat anything within an inch of my mouth side) I decided neutering wasn't best. I also go to the vet on a regular basis and am always sure they check him for any possible tumors associated with him being intact, and give him a self-check every month.
I suppose I have a different opinion on this than most VBers, but I just can't bring myself to believe that one procedure is to the benefit of all the animals it is preformed on. My dog's health is the most important to me, more important than the hypothetical litters of pups he would spawn if he hypothetically ran away and hypothetically had a successive mate with an unspayed female.