Ben Affleck: Early on, you're just grateful to be in a movie. I thought, "We're broke. I'll take whatever pays." Matt was different. He'd turn down movies he didn't believe in, and I thought he was crazy.Looking back, I realized he was right. It's incredibly hard to say no when someone offers you a million dollars, but choosing the right projects matters more.Matt Damon: We had enough to cover rent. That made it easier to be selective.After Good Will Hunting sold for $600,000, we thought we were