Ralph 
2010 Nissan 370Z Coupe 2dr Coupe (3.7L 6cyl 6M)
Impossible to drive smoothly
 Love the design; don't understand why the manual transmission can't be shifted more smoothly; and why missing a couple hundred revs causes a cacophony of drive line clamors.  Traded a Z 4 for this; didn't want to pay the $20M premium for the new Z4; but the BMW manual was quiet and forgiving if rev match wasn't perfect.  Driving manuals for 55 years; never had one so difficult to master.   