The Nissan Z-Car has been, through five generations, one of the best-selling sports cars in the history of sports cars. With the Nissan 370Z breaking cover today we imagine that the sixth generation will be able to carry the torch. The original Datsun 240Z debuted in the United States in 1969, effectively launching the Japanese sports car in America. Since then we've been through ups and downs, with performance-minded versions like the Nismo 350Z and cheesy special editions like the Black Gold 280ZX. Most of us have been teenagers when one of the generations debuted, and remember it filling our prepubescent souls with the unfamiliar feeling of lust. So what's your favorite Z-Car? Which Z is your fairlady? We're partial to the Z32 Twin Turbo 300ZX, which debuted when we were six and haunted our dreams throughout our early development. The styling felt so modern to us, and we think it has aged fairly well. With the twin turbos the 300ZX was good for at least 300 HP and 283 lb-ft of torque, though some claim more. Dwindling sales also meant that the car itself was โ€” and remains โ€” rather rare. While our heart stirs when we see a classic 240Z, the 300ZX will always be associated with our early Steve Millen fantasies. It also stars in one of the best car commercials ever, man. (QOTD is your chance to answer the day's most pressing automotive questions and experience the opinions of the insightful insiders, practicing pundits and gleeful gearheads that make up the Jalopnik commentariat. If you've got a suggestion for a good "Question Of The Day" send an email to tips at jalopnik dot com.) [Photo Credit: Flickr]