idk what to say they're all pretty great honest
the first one is pretty cool, although slightly bland- in the end, not much is happening. Also, the forum background i'm using sorta makes the clouds part unfocused/hard to see a bit.
angry volcano is cool, not much i can honestly say. everything's there that should be there, cool coloring and vectors, etc.
i think there's somethign offish about the mid of the third one, like it's cut off or soemthing. i think i see eyes in a forest or something.