Summary: The big, smiley face grin on the all-new Mazda3 practically screams "I'm good and I know it." Telegraphing dramatic design cues from the Nagara show car, the Mazda3 Sedan (don't worry, hatchback fans, the five-door will follow) again sets new standards in the compact car arena. Like the original, the 2010 Mazda3 places an emphasis on style, features, affordability and, presumably, fun.