Right now it says:

This page will list the boards that you have read the most, sorted in order of the most loved boards. You need to complete more reading for before your first board will appear here. Shrewd on!

It seems the idea is that some algorithm realizes which boards you like most after some time.

I have been to the Berkshire board a dozen times for sure, but it does not show up yet. So I have to click on Stock A-Z, letter B, find Berkshire and click on it many times until it shows up. That's a lot of clicks.

Frankly, I think algorithms take away control from the user, and in fact too much complicated behind the scenes tracking was probably one of the reasons people rejected the new fool boards. (Seemingly random numbers of unread/tracked/new posts, a feed of recommended posts below every post etc.)

I also think that this method makes it more difficult for boards with lower post count to become more popular. For example I used to visit the Micron board every 3 months only after an earnings release, to see what a certain poster had to say about it. That board would probably never make it into my favourites.

The old system with easily adding/removing a favourite board with the heart symbol worked great.

Also, the favourite board page showing the unread post count, and letting you mark each board, and all boards as read with one click would be super useful. That way you can go to a board, focus on reading only what you regard as interesting, and then mark it as read.