Great idea!
I think this would be an awesome way to personalize your steemit profile, and to improve the experience for the writer as well as the audience.
Especially if someone writes a lot of different content (like me and you) it can get quite crowded and hard to find specific things you're interested in
Yup.. I'm liking Steemit's simplicity so far though, and I hope the team will continue keeping it simple. I think 3 containers will be good enough :)