Has she snapped? Or is she just being her true self? Rosie O'Donnell's decision to walk away from her magazine last week -- the latest in a series of life-changing moves -- has prompted debate about the star's damn-the-torpedoes behavior. She pulled out of a business venture valued at more than $100 million. She left 3.5 million readers hanging. She gave up a high-profile platform for her pet causes. And she might wind up spending millions if lawsuits are filed by her or the publisher. Ever since she quit her talk show and came out as a lesbian in...