I try to bring elements of my own personality to every character I've played, but I think I'm pretty similar to the character I'm playing now. The biggest departure would have to have been Freaks and Geeks Sara, who was this sort of subordinate and shy girl.
For the record, I am sticking with my claim that the simultaneous degradation of air quality, water quality, water supply, food safety, soil quality, and other environment-related variables is the main challenge to China's continued development.