Just started doing this...hope you like it...
c&c are welcome..
I think her legs might be a bit to shiny and maybe the wand should cast a little bit of light on her face/wings also santa's thumb if she is right above it cause I really can't tell.
the image has an awesome mood and feel to it good job.
I feel like her head is a tad too small and her feet right now are weird nubs - you should make them look like they are part of the same image by overlapping some part of the fairy over santa (maybe clothes over the thumb), as well as tKill's suggestion with wand lighting.
I really like the textures on Santa's nose and cheeks! haha and that gold tooth