I've always been a big fan, having owned an RX7 convertible. Despite only "3 moving parts" it's not an efficient design - the problems will always be low torque and high heat output. But one reviewer describes revving the rotary through the gears as like running a chain saw through fiberglass. That's very accurate, and so much fun. Everyone should get the opportunity to at least drive one.

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1985 380SE Blue/Blue - 230,000 miles
2012 Subaru Forester 5-speed
2005 Toyota Sienna
2004 Chrysler Sebring convertible
1999 Toyota Tacoma