I think it would be useful to allow us to specify the number of tags shown in the tags dropdown which is shown when a user is posting a topic inside a category which is enforcing use of tags from a specific group.
I had thought about using tags for topic-types, eg chat, discussion, picture, poll, question, library, job, etc however it only shows 5, so if there are say 10 or more topic types, this would become very frustrating for the user (or they would think they only have the first 5 options - which makes using this unsuitable in this type of scenario).
What would be cool is something like this:
Please select a tag from the following:
(lists all tags in that group)
Then when they have selected one, the prompt changes to “now please add at least one more tag”