Too often it seems that ideas are thrown out there like the next Doctor could be a woman or the next Doctor could be black-- the next Doctor just needs to be the best available.
For me the only way to approach the Doctor role is when its next due to be filled open it up to any decent actors to apply for it and then whether they be male, female, black, white, asian etc etc , the best person gets the job.
Anyway a woman is fine by me as long as their biological age is 900 +. I could do without having some raging psychopathic Doctor appearing on my screen every fourth episode.