Hmm...I reckon somewhere between 35 and 40. Old enough to be taken seriously but young enough to not have so many wrinkles. My childhood was too serious, my youth was' angst-ridden' and with the onset of my forties came middle-age spread and grey hair. It would be nice to see my waistline and my long auburn hair again - just for a week. In all honesty though, I do quite like the age I am now (late fifties) as a longer-term option.