Ah, to clarify my point of view (geez, we're in the 3rd page and I still didn't do that?), I'm generally against new tags being added unless they seem really meaningful, but not because my own stories have enough tags to fulfill all their points (my only story currently in the site has 5 tags for one), but because I think a high number of tags actually make things harder on users and on authors as well.
Like uhn... As we discussed the tags in this thread, I actually went through the entire tag list multiple times to see if I could find what would fit into the context of the discussion and stuff. I remembered some of them by head since 95% of those tags were inherited from NU and I went through NU tags dozens and dozens of times to help clean them up (there used to be 1200ish tags before btw, we reduced it to 700ish because there was a bunch of useless stuff).
And well, to put it simply... It's a big pain to go through the whole tag list, and it only becomes more and more of a pain as the number of tags grows bigger and bigger. And like... Even with the current number, there are already tags that get missed (like how Fairies and Werebeasts were missed by you (or was it someone else? I forgot) before), and there are also tags that the person ends up not associating with the thing they want (Like Modern Day for when you want Contemporary), which ends up making things even harder... And then there are redundant tags that exist for God knows what reason (Like Modern Day and Modern Times... Seriously, why do those 2 exist? There was no Modern Times in NU...).
So basically, I feel like an ever-growing number of tags can be counterproductive to the site as a whole as it makes things harder for both readers and authors to find the tags they want when they wanna find/write a story, as not everyone is willing to go through the whole tag list every time they wanna find/write a story to see if there is any tag they forgot about or don't know about that could fit into their story... And well, for the people that are willing to do that, it's actually more of a pain for them too.
That said, useful tags are still useful and should definitely be added... Just uhn... Well, what I consider useful isn't necessarily the same as what other people think I guess? I mean... If it was up to me, I'd exclude all tags related to specific monsters species (Like Dragon), as well as all tags related to the protagonist's weapon (Like Sword Wielder)... But other people find those useful and like them, so... Welp~
... And I'd definitely exclude Modern Times, why does that exist? Seriously... >.>