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.
If you look at the purported dangers of salt or fat, there is no consensus of support in scientific literature. So I would ask first: 'Is it possible to have an informed government that actually follows the science?' From what I've seen, it's not likely.

