Depends on how screwed up my hair is after I ruin it. (meaning: colour it, colour it again, put grey hair remover in (I know, wtf?), dye it some more, highlights, take out the dye, add a little bit of bleach. . Ect, ect.)
I haven't done anything to my hair in a year and a half, though, so it's just blonde and brown atm. After I got the dye out with acid and bleach, though, it had strawberry blonde. That was cool.
Until people asked me why I had such a bad bleach job done. D:
