Woman Time Lords can control the way they will look when they regenerate, while male Time Lords cannot. This was established in Classic Who, when Romana regenerated.
Also, the Doctor wanting to be Ginger is not about the hair color. In Gallifrey, the only ones to have red hair were the people called Heroes which were beings who were time-sentient (meaning they could see all of the time at the same time). So I doubt they will ever make him ginger.
Day 8: Fave MAMD line
Well I have two. The picture is my favorite line because of the way that Jamie says it and then my favorite lyric (still counts as a line) is “I thought I wanted someone who was perfect as be when what I needed was someone was perfect for me” from even though.