I'm the same. I often favourite posts I find noteworthy, useful or I want to revisit later. It's a pity you can't favourite with a single click from the list view (e.g. front page) or for comments from the thread view. I think, especially for comments, the favourite feature is hard to discover and inconvenient to use. Wish it would be easier so more people would use it because skimming through other peoples favourites is also an entertaining pasttime.