I would add the menu [Interesting][1] in the question list if not too late for that. 

It's a nice feature as it filter with the watched tag's feature the question list.

As seen on StackOverflow;

[![enter image description here][2]][2]


  [1]: https://meta.stackexchange.com/questions/86857/what-is-the-list-of-interesting-questions-on-stack-overflow
  [2]: https://i.sstatic.net/Bm8Hb.png