What if we could create our own subcategories for the search bar in champ select?

You know how in champ select, you can type "marksman" or "support" and it will bring up champions who align with that category? What if we had a system that allowed us to create our own list of champions that we can single out by typing in a certain keyword? To make it simple enough, it could be something like cat1 (category 1), cat2, cat3, etc. This would be quite a nice quality of life thing, not to mention useful to players who have all/most champions, or even ones that play champions who's predetermined roles aren't what they're usually associated with? I think this would be a very nice addition to League.