Found a bug or two I think:
When deleting (resetting) the data because I recustomized the moods , it seems a user is unable to make a new vote if he'd already made an 'old' one one for that same post.
When sharing a mood on FB or Twitter, the 'Share this'-message doens't disappear after sending them. But perhaps that's because it seems to send a message to FB or Twitter, but never to both of them.
The ability to create different mood-sets. Something like [moodthingy set=1]
The ability to choose to send it to either FB or Twitter (or both).
The ability to add the post's 'featured image' (if any) when sharing a mood to social media.