I would imagine you could also similarly find the things you either stay away from or actively dislike. Sort of a topical noise cancellation. Train it to know your preferences, but to occasionally give material outside the comfort zone. I think you'd really need a substantial map of topics to have a good understanding of where contrasts lie, but we're likely on track with the datasets currently being built in public sites like Reddit.

Really, I'm surprised this feature isn't implemented anywhere, since one of the joys of the Internet is being delighted by a new idea you haven't seen before. I certainly would appreciate filtering of the obvious rubbish like Fry is exasperated with, but having quality dissenting opinions available is precious.

So you will upvote differing views that you find interesting. And they will be included in your "bubble". Tada.