I chose Light Brown. Because its the closest color to my own natural hair.
But, personally I think all "natural" hair colors have there pluses and minuses.
There are certain skin tones or eye colors that compliment the color of hair.
Im not picky about natural colors.
These are some bad combinations, IMHO:
brown or dark tan skin with bright red or blonde hair
((better choice)) is a light brows, browns, auburns, and pitch black
Pale skin with Pitch Black hair - sometimes its ok, but not really natural looking
((Any pale or lighter skin)) looks good with any hair color, but pitch black. Sometimes looks kind of ghosty, to have pale skin and dark hair. But if thats what you like?
Its all a matter of oppinion though. Sometimes they work sometimes they dont. It also based on what kind of hairstyle they have or if the dye is close to thier natural color.
It also has to do with facial features like shape, skin tone, eye color, makup, nose shape, lip type, etc.
Honestly, thinking to much about hair color isn't worth it. I found that I usually bounce between blonde, brunette, black, and redhead for different unkown reasons. Its the overall beauty of the woman that counts. And of course if she has a likable personality.