My past is not today - Princess Luna

I actually drew this picture in one of my sketchbooks a year ago. Well the other picture looks a little bit different, because I drew ponies in a more different(and in my opinion worse) way than today.
But it was the first idea that came into my mind, when I thought about what to draw with the drawing tablet.
And it took like one or two weeks to finish, because 1. I were really slow while working on it  2. I had to go to school and do my homework >-< and 3. I had some days were I just wasn't in the mood.
So yeah I'm really happy about the finished picture and I'd love to hear your opinion.

Have a nice day  

Princess Luna, Nightmare Moon (c) MLP:FiM