Personally, I like to check the South Park Controversies Page every now and then.

The page on Quantum Entanglement is fascinating and has so many rabbit hole links that lead to other rabbit holes themselves. I still go back and re-read them here and there to improve my understanding and check for laymen's updates without all pop-science nonsense you encounter elsewhere.

I'll come back and post a few more when I can think of them!

It can be your favorite for any reason: interesting subject, extremely in depth and well written, funny details, “branching potential” (it links to a lot of interesting topics you can branch off to), etc.