Or at least the four most common!

Upper Left: Hungry boi. Wants you, your snacks, and anything else he can stuff past those greedy jaws. I suggest cheese or chocolate.

Upper Right: Happy boi. The usual mood of fluzz butt, he's just pleased to see you and wants your attention.

Bottom Left: Despresso boi. Of course there's times when he's sad. More rare than the other three, but common enough to list. Sometimes the fuzz will just feel alone and unloved.

Bottom Right: Sleey boi. And this here is a dragons natural state of being! Naps, snoozes, sleepy time or pseudo coma, it's all free realestate to fuzz butt.

Just four stickers I got cause I loved the art style. Art is by  Nugget_kun