make my tags visible as a group or list on ADD BOOKS page.

This will allow me to choose from my own group of tag choices as I am adding rather than guessing at how I have listed a tag. For instance, did I tag The Hemingses of Monticello as "slavery" or "anti-slavery"? Hmmmm. If I guess incorrectly then I just end up with too many similar tags which I do not want. Having my tag choices pop up as I am typing is not very efficient or workable, especially for those of us who have our own version of typing.

I certainly do NOT want to see my long list of tags on the add book page.

I think a “show all” like there is for collections would be handy. I don’t want to see the whole list every time, but sometimes it would be handy to be able to consult the list.

>1 Mary_Charlotte: That field should have an autocomplete that pops up as you type.

>1 Mary_Charlotte: You can edit your tags to match if you type in too many similar on the Tags page.
Your browser and Librarything already offer a typing suggestion pop up. -- No wait, you refuse to use that because it's too inefficient. But I don't think you'll get more than that.

Oh, I misunderstood what the OP was requesting. They already know about the autocomplete.

>1 Mary_Charlotte:

You could always open your tag list in another tab.

Autocomplete is usually not helpful when typing the first tag in East Asian languages, where tags that are two or three characters long are common. In addition, in order to type the half-width commas between tags, I have to switch IME and then switch back to type the next tag, which is inconvenient for me.
I would like to have a feature that allows adding tags by clicking on them from a tag list.

>3 Charon07: I agree, I'd like that