These are incredible!
FYI, most of your fairies look amazing, I assume those that look a bit off were your early works. Your artistic skills are phenomenal. If I were going to give any constructive criticism, I would say work on your lighting and shading to give a more natural appearance.
For my part, I'm grabbing your Fairy Wings because another artist forgot to post his forward facing fairy wings, so I may or may not use your wings with his fairies someday. If I do, I'll try to remember to come back and let you know. :)