This is the most critical element. In principle you are looking for a hairstyle to be in opposition to your face. So if you have an angular face you want softer styles and vice versa. The best way is to look in the mirror at yourself, take a lipstick out and draw your face shape shape on the mirror. Then compare it to my summaries below.
I think there are 8 types as follows:
If you want to take the eye away from big ears cover them up with a medium of longer wig. A big mouth keep the hair off the face. A big nose make sure you have a swept fringe with a side parting not a centre one.
This depends on whether you want to stand out of not. But from my experience you have to combine perfect make-up with a great wig if you go for a very serious contrast of for example light skin with a dark wig. The reality that blends better is to move the two tones closer together. Work with your skin tone not against it until you gain confidence.
Think about use and context
If you dress for long periods of time you have to live with it. My partner hates hair getting in her face if she is cooking, eating and walking around. She says the long hair is great for a little posing but becomes a pain whenever she has to do anything. So Tara has gone much shorter.