Whether you're not quite ready to grow up or you're pining for the days before you did, a sporty two-door coupe such as Audi's A5 is an alluring choice. The A5 convertible (Audi calls it a cabriolet) kicks up the responsibility-shirking freedom yet another notch. A turbocharged four-cylinder engine provides plenty of hustle, while a sport-tuned suspension and standard Quattro all-wheel drive make the A5 one of the most sure-footed cars in its class. All the modern high-tech gadgetry such as smartphone integration and semi-autonomous safety features are accounted for as well. Plus, the A5 offers a reasonable amount of practicality, so it's not a completely unreasonable purchase—especially the coupe, which offers cargo space that almost rivals larger sedans.