Seriously is it possible to let beginners suggest tags? I tried to create the tag XFCE-desktop which is the large package I had to reinstall, but was told I did not have 300 points. It is more to the point with XFCE-desktop than just the tag XFCE. I have learned that precision is crucial when solving problems and thought that precise tags would have the same principles.
Tags are for classifying questions, and thereby allowing people who are interested in a particular topic focus on that topic. If a tag is too narrow, few people will be interested in it, and it becomes useless. If a tag is too broad, people will pick narrower tags.
No one is interested in the
xfce-desktop package ... because there is no such package. Assuming that you meant
xubuntu-desktop, why would anyone be interested in that package specifically? People are interested in Xubuntu or XFCE. Virtually no one (except the maintainer) cares about that package. Even you, who wants to create a tag named after it, wouldn't give two bits about it once your problem is solved and you don't have to touch that package again.