I voted, and I chose radioactive for unique! That category seems pretty open to me and radio fits right in it for me.
...that can be good... its really all about just setting it up good and leaving it be... its like cliffnotes for the search engines- invisible #hashtags basically... I wouldn't keep em on long-term, from what I know in this area...(not a whole lot)...but, its pretty simple stuff...IMO not that important (for dedicated tinkering)...
ETA:
for example, search "usa e liquid" , you are the first listing on page 9. If you want to improve this, add more places and tags throughout the site where you mention those keywords... google analytics 4tw....
I chose Radio as well, in post #25