It seems that most of the *_skin tags, especially pale skin are grossly under-tagged (~3510 posts).
I'm pretty confident that there are much more posts with characters of that skin colour out there,given the focus of the site,so feel free to add in *_skin when you can,while tagging
(Has this been brought up already?The most recent discussion seems to be about dark skin )
Also,according to the wiki,is pale skin to be kept separate from the average Caucasian skin colour,
i.e. Not tagging every picture with a light-skinned person as pale_skin?
Updated