Stroll

Let me start off with the colour palette - it's gorgeous, and the way the lava contrasts so well with the sky makes me wonder about the temperature difference in the place pictured. The character is a dragon after all, maybe it stays close to the lava purely for warmth?
The pose is dynamic and so is the background. I love the way you played with shapes on the lava and the composition it creates. The dragon has a very interesting form - kind of like a moray eel - which makes me think that maybe this dragon is a semi-aquatic species. The horns and lifted wings add to the dynamic, making the overall picture a really interesting piece to look at.
The first major problem with this piece, is that the background draws more attention to the viewer than the character. The lava has sharper edges and more detail than the dragon, making it pop more and "drowning" the character. I don't think a lot of work would have to be done for the dragon to be the first element to bring the viewer's attention - the glowing eyes and nostrils already make a fairly good job of making sure it goes unnoticed. I'm not sure how reflective/shiny you wanted the dragon to be, but describing its shape with subtle lines of reflected light for example would do the job. Otherwise, it's a good idea to keep the back of it blurry like it is; it adds to the overall dynamic as well. I can also see that you struggled a little bit with the light source - the front leg that's dipped in lava appears quite flat and the shading on its chest is a little confusing.
Overall I got to say I love this piece - you have a wonderful style and I can see you have a great grip on the from of your characters. Keep up the great work!