There's an obvious reason why the 2010 Toyota Corolla is bound to be one of the country's best-selling vehicles this year: Since its debut more than four decades ago, the Corolla has become synonymous with dependability. That alone, we suspect, is enough for many. But if these shoppers did venture over to their local Hyundai or Mazda or Honda dealers for some test-drives, they'd likely realize that the Corolla is far from the class leader it once was. It's not a bad car by any stretch of the imagination -- it's just that its rivals have gotten better, while Toyota has largely stood pat. Learn more about the 2010 Toyota Corolla S