Depends entirely on the woman. Usually I get into a woman because I like the whole package, and if they change their hair colour then it detracts from what attracted me to them in the first place. Similarly I can pass on a lady, but a change of hair colour can suddenly make me far more interested in them. Sometimes however this is spectacularly NOT the case. Some women can pull off different hair colours, others can't. Almost any girl I become very much into as a brunette, I don't care for if they go blonde. A lot of it has to do with skin tone too, but still, it's very girl specific. I love paler skin with dark hair as a general rule, but when Kagney did a set with a black wig, it did nothing for me, because I'm too into her as a blonde. I usually think anybody I got into as a blonde or brunette will not look as good if they try the red look, but Siri pulled it off spectacularly. There are always exceptions to the loose rules. If I look at all the stars/models I love... there are probably the biggest number of brunettes, then blondes, then redheads. But there are girls I LOVE from all three categories. So all I can really say for definite is.... depends on the girl.
