Spacescreamer
Innovator
Its not about the comfort. But think about it, you would generally handle the phone with the right hand and volume rockers have been positioned precisely for that reason on the right side of the phones traditionally. 
Now you ll prolly say that its not tough to use the phone with the other hand but its just weird to put the vol rocker on the left all of a sudden.

Now you ll prolly say that its not tough to use the phone with the other hand but its just weird to put the vol rocker on the left all of a sudden.