A,B,C,D,E, and F. I use the tag of the towel to determined the use of my towel. Tag always goes bottom right and that means my feet always go there to dry. Divide my towel to 4-5 sections and always use the same spot of the towel for the same parts.
I dry from head to toe. I use two towel, one just for my hair because I have long-ass hair and by the time I'm done drying it, the towel is usually pretty damp so I have another for my body.
That sounds unhinged to me. Are you perhaps bald? My hair is really thick and not very porous so it holds water rediculously well. If I did that it'd take 30 minutes
B, A, using one whole side of the towel. Then fold it in half with the dry side out. Shoulders/begin C3, C4, C1, finish C3/C2, D2, D1, E1, E2, F, all with one side of the towel. Then flip it and use the dry outer side to do a quick pass in the same order.
Surprised we haven't heard from the germophobes that they use a gantry of hot air blowers, like you sometimes find at the end of an automated car wash.
I put on my hooded terry cloth bathrobe that simultaneously dries hair, head, neck, torso and legs above the knees. Wipe face, lower legs and feet. Remove robe and dry genitals and butt crack.
Top to bottom-ish. But I consistently use one side of the towel for my face, and the other side for my junk. I know it doesn't matter as I have cleaned up everywhere anyway, but I like to keep it separated anyway.
Start at the top and move down. Any areas such as crotch, ass, and feet are dried with the end of the towel while the face is dried with the middle of the towel.
Neck to crotch on the front then a good rough polish cycle to try and dry off my back - all with a nice thin towel that knocks the moisture off rather than absorbing it. Once my body is done I have a separate fluffy towel for my long hair, face, and beard.
I always start with my hair first, dry my back and upper body, then my legs. But then I keep a second towel for intimate areas, because why would you want to wipe your face with the same towel you wipe your ass with?