My hair was growing at warp speed and the brighter red was fading fast. Simply put, I can't afford the 4 week keep-up it would require. So I made the decision to go darker. By the time this really fades enough to be super noticiable, it will be closer to summer, then I'll go the brighter red route again, then darker for fall.
Before (can you believe it already needed a trim?):
After (she mixed a neutral chocolate brown with copper for my main color, and gave be bright red and blonde peekaboo highlights underneath... visible when I pull it back, wear a ponytail, etc.):
I also had her cut me some more long bangs, but I had them sprayed over to the side in these pics.