Most Helpful Guy
Honestly, as a guy, I don't notice hair much more than how long and what color it is. My eyes tend to stay drawn to a few other body parts especially if I just met the person.
Hair doesn't impress me and the most beautiful hair IMO is natural looking (normally brown) plain old straight hair.
I had an ex girlfriend with multi colored hair that she would spike up at times. People would look at her like she was crazy when she did this but I got a kick out of some of their reactions. No I didn't particularly like her hair but meh.
Hope this helps!