Kevin recently asked a question about how to handle favourite changes, and whether to put them in the global inbox. The problem is that the 'use case' for favourites is (I think) not the same for everyone.
I think it would be useful for the team, and interesting for the rest of us, to know what people actually use the favourites for - and if they use it at all.
This is a fuzzy question, with the risk of degenerating into a poll, but I think it's important.