I like these pictures a lot, but I think that you should try experimenting with poses other than the ones that the creatu already have. ^^ The pictures are good, still. :3 You have nice clean lines :)
Also, if you need to rotate, try just using MS Paint :3 It works fine to help :D
Their good. Quick question, Did you look at the pictures while you drew? This isn't a bad thing, but like they said, its nice to change it up. Try changing it up. Try adding a special touch of your own, or a different pose. They ARE good dont get me wrong. But theirs only so much you can do with one pose C: