A painting of one of my favorite people (fictional or otherwise) of all time: Lisbeth Salander.
Everytime a situation comes up, I think: What would Lisbeth do? (Or what would Aragorn do. Or Tom Cruise.) She is such a spectacular character, so unbreakable, uncompromising, and most of all, unforgiving.
I personally liked the American version much more. Rooney totally nailed the role, and she had the build for it. Not to say that Noomi wasn't already great.
I don't know how long it took. I've been working on it on and off, sometimes the offs lasted a week or so.