Wow. I am truly impressed by this piece. I love fantasy-related images in general, and yours is a really eye-catching one. I myself am a beginner, so my critique might not be very useful, especially considered how good you already are, but I just felt like expressing my liking of this particular artwork The subject of a beautiful woman in a fantasy-setting has been done many times, but yours is executed very well. The coloring is especially awesome, particularly on the skin! It looks extremely realistic! And also everything else - her pose, the dragon, the water effects, all the sourroundings are just beautifully done Overall, one breathtaking piece of art!
A messenger dragon? Hmm....The dragon landing on her hand rather than the rock next to her suggests more intimacy between the two than just sharing a message. Perhaps he is her regular courier? I like the detail and coloring of both the background and the foreground. This picture easily lends itself to a number of stories and tales.