With 'Suffragette,' I felt that a female writer would be good, and considering the subject matter, who would be better to write the script than Abi Morgan? She was the first choice, and she happens to be a woman.
Really, I am entirely material driven. If a project appeals to me, I will try to find the right writer and director. And that may be someone I've worked with before, or it may not. It may be a woman, or it may not.