The image is by Mo Manning (Digital Pencil Too)
2010 - I am quite pleased with her hair. (E31 E35 E57). All I did was little squiggles with dark, medium, and light after coloring all over with the lightest. I even like the outfit (r35 R46 r59). Her wings were with YG95 but were not smooth so I added some pearl paint over them. Here skin (God only knows what colors I used). The skin is blotchy and I am not happy with the outcome but back then it worked for me. So this was one of my favorite images colored "way back when".
2012 - And this is now. I chose colors that posed more of a challenge for the skin (E25 E27 E29) and was able to accomplish smoothness. I even added shadows using BV04. Here outfit was with the same colors as before (R35 R46 R59) The wings were with R35 YG11 BG10 and YG95 using tip to tip application. Here hair...same squiggle idea but this time I went with E79 as my darkest with less blending for more contrast. (I like both coloring styles). The water was also using tip to tip with the BG10 YG11 and E25, tip to pallet. I am more pleased with the overall of this rendition of the image, but even more pleased to see I have grown.
Don't give up! Keep on practicing, playing and creating. You don't improve by just staring at your paper with pen in hand...you improve with applying it to the paper...over and over and over again. It is just paper and ink!