Hey there, I really like the new version of your griffin, the improvement is definitely visible! Especially the proportions and posture look a lot more natural in your recent art, while still retaining the special charm of your style.^^
After drawing on MS Paint for a year now, it seems as if you have mastered the program by now^^ It's quite a decent drawing tool, and I have been using it to some good success before, but if you're looking to try out something new I could recommend you the drawing program I am currently using: Paint.NET is basically a free upgraded version of MS paint, which keeps all the familiar basic functions, while also allowing you to play around with layers and transparency. It's quite helpful if you ever feel like looking into shading and backgrounds etc. :P
By the way, is it just me or is your recent robot image facing towards the right? *_*