I have yet to see a style of drawing wings that is prettier than yours, and the impossibly long hair compliments the entire operation. Even on Scootaloo, who is notorious for her rather short mane and small wings, you've created an elegance that is unmatched by anyone else. This is definitely my favorite picture of yours (though your Derpy Hooves one comes a close second). I enjoy how you keep some of the original hairstyle while adding incredible elegance (even to Rainbow Dash, who is notorious for being fast but not so much elegant), especially on this picture.
So in short, I loved it and I wish you'd draw more pegasi. Actually, I have a suggestion (take it or leave it, I'm not the epic artist here, you are). Could you maybe do an alicorn Twilight? That would be EPIC.
Err... I'm sorry, but your English doesn't make a lot of sense So, I'm not entirely sure what you mean.
But, I'm fine with my art being used, for non-commercial purposes and if I get credited and a link to my deviantart page is added. For example: "Drawing by Secret-Pony (http://secret-pony.deviantart.com/)"
I really like your big-winged pegasi series, and this is my absolute favorite, it's so gorgeous and flowing, really nice work. *interesting thought, if pegasi weigh too much over one-hundred pounds then they'd pretty much HAVE to have wings this big in order to fly (unless they use magic to fly or decrease their weight/mass), they'd also need incredible wing strength, though I do believe I once saw a small pegasus mare bench-pressing a HUGE amount of weight with just her wings in the tornado duty episode.
2nd fav of your artworks, but she is my favorite pony. You're vision of fluttershy is Beautiful. Her mane looks so free and lifelike, and her wings look elegant. Its almost like she's flying(running) away from something like she did in hurricane Fluttershy. Utterly amazing. Once again, I love your work!