I really, really love this picture.



Like StarletNightwind said, you changed Chrysalis, but for the better.



In the show, she has too large eyes and a somewhat stiff way of moving, adding to the unsettling aura the rest of her fairy/insect-inspired design gave her, but here her face looks more like a normal pony's, and even her posture looks loose, like a pony would flex.



Now, usually that would have me all, "ah, you just wanted to make her pretty for shallow reasons, blah blah blah", but here it just works. You still captured that playful and arrogant way of being she has in her eyes and mouth (dat fang).



Even her mane moving by an unseen wind says "am I cool, or what?", but although some strands look like hair, and the mane in general moves a lot like hair, most of it it still has that stiff and membrane-y look from the show weighing it down. Her wings look even more fragile and lighter than in the show, but that only makes the presence of the rest of her body stand out even more while making her look otherworldly. You still managed to make her look Not Normal enough to register as, "yup, still a Changeling".



And that's to say nothing of the pretty and soft but vivid shading, the excellent composition and the appropriate and well-thought use of color that gives it just enough depth to offset the flatness the soft shading would otherwise give the picture.



Still, what really, truly makes the picture is the lightning from the flames, the green in the background and the darkness on top--all together making this oval-type of frame around Chrysalis. It makes this look like a proper portrait, and it illuminates her body just right, and makes the glow of her eyes seem just as magical and dangerous as the rest of her: a powerful, prideful, real Queen.



...



And those were WAY too many words about a character from a show about colorful ponies.