User-defined filtering categories

Not sure if someone already suggested this, so appologies if this is a repeat request. Also, not sure if this is an existing feature that I failed to find after exporing imzy for a few hours as a new user.

User-defined filtering categories: It would be nice if imzy allowed each user to set up their own user-defined filtering categories for organizing all the communities they follow such that the user can assign each of those communities to one or more of their user-defined categories. That would allow them to use their user-defined categories for filtering the content they see on their feed. For instance, I might want to have a special set of categories I create for myself that are called "art communities," "gaming," "technology news," "memes & gifs," "my friends' personal communities," and "world news." This would allow me to filter my feed to only show me the latest in certain categories that I have defined for myself. Sites such as LiveJournal and Dreamwidth have this feature and I have found it very useful for keeping up to date with lots of different subscriptions.

The problem I have with sites like tumblr and twitter is that high frequency bloggers & tweeters tend to overwhelm my feed. Once that happens, any content from blogs/users who only post once a day or just a couple times per week ends up completely lost in a sea of other stuff.

Even thoguh I can click through individual communities in my imzy sidebar right now, once I follow more than a dozen communities this becomes a hassle especially when I don't appear to have any control over the order in which those communties are listed on my sidebar.