Adding a feature to the IMDb website/app!

I'm really hoping someone maintaining/moderating this website and comments section sees this! But I was wondering if a feature could be added to IMDb that lets users bookmark/tag actors, actresses, directors, cinematographers, etc etc. and have those show up in a tab/page within the website/app?
-Purpose: Being able to catalog favorite figures in media and have a easy section to view and catalog. Furthermore having an easy way to catalog these people in one easy list in order to periodically check new/future projects from them.
-Extent: It does not need to be any more complicated than just a single section. But further ideas would be to allow the website to email/notify the user when the persons tagged when they are cast or involved in any future projects!
-Logistically: I have no idea how complicated or expensive adding this feature would be, but I know a decent amount of people who would love and appreciate it. I unfortunately have no idea otherwise :(

TL;DR - Let us tag actors, actresses, directors, cinematographers, etc from their page on a personal catalog to compile a sort of "favorites" list.

--Thanks!!