How should we tag these posts?
OS specific tags are good, as is the setup tag (I think this is good for any aspect of setting up the Pi.)
Not convinced on the operating-systems tag though - isn't this implied by the OS specific tag anyway? I say remove it.
The tags should be becoming self explanitory by now. If users are confused about what tags to use then I think we have a problem with our tag wikis which probably needs action.
Ask yourself what would make the question easiest to find, and what tag it would benefit from most.