I don't know if you can add more moods or what type of program you are using to run this site (I'm assuming that you are using Java script). But First are we allowed to think about new mood ideas and second my idea is Binge_watching. What that means is that you are watching an entire show/season on Netflix/Hulu in a day. Anyone else agree?
There are a ton of other moods I'd suggest... I'm just forgetting what they are. I'll post to this thread when I remember them next time I'm looking through.
The moods thing is just a third party add-on. You can easily add different ones, you just need to make the images for them.