Write about someone who inspires you
Ok, this might seem like an odd answer, but I'm choosing Jo Rowling. You should bear in mind that in the past year I reread all the Harry Potter books and then very recently rewatched all eight movies in the span of one week so we could prepare to go to Harry Potter World in Osaka. (Amazing.) We bought the movies on iTunes and I've been watching the special features since we got back. One of them (Deathly Hallows Part 1, I think) includes a documentary about Jo Rowling and parts of it have been running around in my head in the days that followed.
I love the label she gives herself: "I'm a trier". (Tryer? I don't know.) It's a word I want to adopt for myself and pass on to my students. When she was asked if she felt she was lucky, she said having the idea was lucky. I think that's an important distinction. Having the idea was lucky, but the execution was her own hard work. She spent six years writing the first book, not knowing if she'd ever make a dime from it. Over the course of another year, it was rejected by numerous publishers for being too long before finally someone took a chance on it, on the advice of his eight year-old daughter.
I also have a lot of respect for the messages and morals she intentionally infused into the books. One example is equality. Harry came to her as a boy (something I understand - characters showing up fully formed and often with their names) but she made sure to include a number of strong female characters. Since magic removes physical strength from the equation, her women are able to fight as equals with the men. In the book, when Harry Potter returns to Hogwarts and Snape raises his wand, Professor McGonagall steps in front of Harry and takes Snape on herself. The makers of the movie wanted to have Harry face Snape instead, a change Rowling fought. This feels really authentic to me as, sadly, in this country we have seen numerous female teachers place themselves between their students and danger. Rowling wanted Hermione to represent herself and all of us girls who grew up bookish, smart, and plain, but without making a caricature of the bespectacled nerd. Hermione is the equal of any boy in the story. Rowling certainly won my heart by mentioning that in her own childhood reading, the character she most identified with was Jo March, my own number one childhood hero.
I admire not only her talent, but her tenacity, thoughtfulness, and generosity. If you're interested in learning more, you can watch J.K. Rowling - A Year in the Life on Youtube.