[Anahki]

I have my own preferences, but I should also consider your previous works to see what could fit better.
Let's say:
1)Hair colour: better dark hair than blonde: for some reason the effect of fine fur seems less "authentic". Moreover, you will not need to show a transition in hair colour from human blond-hair to wolf gray/brown typical one, or the transition will be smooth with darker colours. And last but not least, there will be more contrast with the skin, and that will give a better effect on initial stages of the transformation.
2)Skin colour: For the same reason indicated about the contrast, it is better a fair skin than a darker one. My personal preference is fair but with a bit tonned, so this will give her a "healthy" look. Moreover, the sweaty-skin effect will work nice in less fair skins.
3)Body type: there are many people here into FMG, but that could be distracting and will bias the result of the TF. So a normal-non athletic body would be ok. I see that you like big breasts. For me they look a bit unrealistic, but I propose you to start with "normal" sized breasts, and increase their size a bit, but not so much.
I know that you haven't said anything about what kind of TF you're going to make, but I assume that it is going to be a werewolf, or I am wrong? For other creatures maybe some of my previous assetments are, of course, not valid.
Finally, it is your creature. I'll love to se what you're going to "cook" for us, whatever you decide. Good luck with all buddy.