is there an official list of tags somewhere on this site? sometimes when i try to add a tag it would be the only one like that so i really need to find a list. i heard (or saw, whatever!) that there is one but i currently haven't had any luck finding it

well i guess it can be under the tag option from the more options button on the homepage X.X
is this the right one?

Below the tagging box you can see:
Related tags | Related artists | Related characters | Related copyrights

Click on those.

Fox2K9 said:
Below the tagging box you can see:
Related tags | Related artists | Related characters | Related copyrights

Click on those.

of course
*slaps self on forehead*
right where you tag the images...
genius

http://www.e621.net/tag/index
This is a searchable list of all tags.

http://www.e621.net/tag/cloud
These are whatever happens to be the most used ones at the time you click it, with bigger name = used more.