I have never dated a woman that significantly changed her hair. I usually only am attracted to long haired brunette middle eastern girls, because I think hair is a major expression of a girls femininity (and i heavily fvck with very feminine girls). However, one thing I think we can agree on is that when a girl constantly changes her hair, it subtly screams "Look at me! Give me attention!" Perhaps this derives from an inner insecurity of not getting enough attention from her parents, perhaps this derives from a mental illness such as BPD, perhaps this derives from a past boyfriend that didn't give her any attention at all. Clearly, however, if you were to date a girl like this she would constantly be wanting attention from you, and may actually get easily upset if you don't provide this for her. There may be unnecessary arguments, getting mad for no reason, clinginess etc etc. The point of the relationship for these girls is to receive attention. It is a form of value-sucking, and so I would say that any relationship with them might perhaps be founded on an unhealthy foundations.
This is presupposing that they actually have a inner insecurity and need for attention and that this alone is what is motivating their continual change in hairstyle. I don't usually like to think in black and white terms, and obviously some of them simply like the look. But be wary and gauge based on other actions. I personally wouldn't date one, just because I don't think it looks good. I like a traditionally beautiful feminine woman, who is perhaps a little bit ethnically ambiguous. But if you are into this type of girl, just keep your eyes peeled for red-flags.
