I wouldnt recommend installing the beta on your main device, as it is a work in progress.
Morally you should only install the beta if your a dev and want to try it out, but i say whatever to that so as long as you pay for your dev account, you can do as you please.
iOS 6 though a small update is an update nevertheless nothing jawdropping from 3 to 4 or from 4 to 5..