Dogs like people, have different personalities and different ways of expressing emotion. You can't stop someone from jumping up and down each time they get a big win at the casino, so maybe this is the case with your dog. Might have to accept him the way he is. :)
My Dog Will Only Turn In Left Circles. He Will Do It When He Is Happy, Nervous And Just Going For A Walk. He Doesn't Have Any Type Of Ear Infection. I Don't Know Why He Does This Or What I Can Do To Stop It. Can You Help?
I have a female terrier/shitzu who does exactly like yours, but mine goes only to the right. I was told that it is a behavior problem.
You didn't mention what kind of dog is. Does he run into walls at all and have a big domed head and maybe eyes that are a little buggy? It could be hydrocephalus (water on the brain). Your description makes it sound more like he's just a happy little guy though :-).