I want to explain how our "recomended tab" widget works.
As you can see from explain feature our recomendations are based on your favorite tabs and artists. So if you have lot's of tabs and artists in your favorites, you get more recomendations and less random tabs. Still there always will be a chance of getting random tabs. I personaly think it's not such a bad concept.
As for the recently added, recomendations are not based on your profile or site activity, it's just most popular tabs that were recently added into our archive.