Re: Matt Smith's Departure Confirmed.
There's no reason whatever that a female Doctor would have to be any more 'normal' than the current incarnation. She could still be an insensitive, self-loathing, solitary creature that needs an external presence to round off the rough edges. It would, however, be interesting to have a female Doctor to counteract all the shrieking in terror that the companions usually get up to.
Some say that he was the first choice to play the new Doctor but turned it down when he couldn't put racing stripes on the TARDIS.
All we know is, he's called The Stig.