probably not the best name in the world but its only an Idea.
fair enough you can say mood:happy at the bottom of your post, but what I'd like to do is be able to give a post a mood rating.
So if 10 is brilliant and 1 is feeling dreadful. When I make a post I select a box saying what mood I'm in, it can be public or private with a stats page so you can see how happy/sad you are on average!
Maybe if the stats page was graphical it would be nicer too though I'm by no means an expert on this topic!
I was looking into trying to do this myself, but plainly my coding skills do not go far enough having poked at other plugins!! Though I've found similar ones where users rate the posts, this one is just for the authers.