I promise you won't regret it. As I said before, you really are doing Joey a service by taking away his drive that he is not allowed to satisfy. Nothing else will change. I neutered Shelby-Dale when he was 2 1/2 years old and I was so worried something about him would change. NOTHING changed. He is still the same dog he was...no personality changes at all.
If you go into it feeling bad and making a big deal about it, Joey will sense that. He might react to that and that can change him. Make sure you act like it's just all in a day's routine for him. He'll be fine if you do that
With that said, I agree with Crystal..don't feel you have to do it because you are being forced to do so.