I can see what you were going for. Her expression is intense. Determined and brave. You capture her leadership aspect very well here.
Alicorn twilight has been done a lot since the episode aired (and even before then!). It's always fun to see a different take on it! Some people make her sad to be an alicorn, some make her excited. Here we see her ready to take on the challenge!... after a quick book or two, of course.
The only thing is her wing looks a little low on the body, and it looks like it's coming out the top of her hip rather than her sides. Nothing a quick fix can't do anything about. I would recommend just moving it up juuuuust a smidge.
Aiii..... I hate it when people see Twilicorn as a good thing. MLP Was a great show....until Hasbro decided they should go for the preverbial "Every girl wants to be a Princess/Girl Merchandise Cash Cow" Route!!!
I think Twi deserved it, we watched her from the first episode grow into a better character. Would you rather her going through anxiety and going crazy? She's fought all the challenges and learned and changed because of it. I know this comment is late, but think of Twilight starting as a kid in season 1, and growing into an adult.