I'd love to have short hair for a bit al la Agyness Deyn, but I would look HORRIBLE with that hair cut.
I'm getting mine cut today. Don't know what I'm doing yet - probably a version of the same. I don't have the face to pull off too many styles.
As for color, I have been thinking of going back to what was my natural color (which is sort of a red/brown/blond/amber color). It would still require lots of upkeep though. Too much grey.