I like categorising my tags with specific prefix/suffixes: e.g., for authors I track how old they were when they published the book (auth30s, auth40s, etc.).
It would be great if instead of adding the tags one by one, we can define a "rule" in custom graphs, so all current (and future!) tags with same prefix/suffix will be automatically added to the plot (e.g., auth*).

With this way, when I introduce a new tag in the future, I wouldn't need to adjust my custom graph.