Whenever I start counting the CF Tags I know one by one, Geometry Always comes almost the last, I think it is very unpopular on CF aswell.
Geometry problems, add more geometry problems
I have seen a lot of great adhoc ideas be used in several topics and tags, but geometry and some others occurred very rare, I think trying to take advantage of such uncommon ideas may help in getting ideas for problems.
I have noticed though that in the early years of codeforces some really good geometry problems were proposed, I think it will be cool to revive this era.
if you want geometry, go and solve some math problems.
Anything but geometry, please
Geometry gives us PTSD (and there's even an Open Cup problem named Geometry PTSD)