I am prone to this weakness as well.
Honestly prefer natural shades, the orange look or the darker ginger/auburn look.
The reasoning I think stems back to the "firey, passionate" connotation that is supposed to be with it.
However, ive found for long term relationships that kind of mentality is just a recipe for disaster. I come from ginger stock and putting two people with that bloodline in the same room for extended periods of time is pretty much like tying two cats together, it will not end well, and someone else always has to intervene
Dyed red... eh. its alright. Kinda like the silicone syndrome. It seems nice but the longer your exposed to it, the less allure it has.