I am completely unable to maintain a mood. I tend to have to keep doing stuff that I find amusing in order to stay happy. On the plus side though, this also means that I just can't stick with a bad/unpleasant mood for very long (although I have been known to revisit them frequently :)
Nothing has changed, I should probably still feel blah and grumpy, but I don't. I probably will later, or maybe this weekend when I start thinking about specific things again, but right now I feel good.
My brain chemistry is weird.