2009 BMW 335d.
Sometimes I miss the effortless torque (mine was chipped, making 525+ TQ @1700RPM). Sometimes I miss having a decent sounding stereo too.
I don't miss the seats, the body roll, the sheer heft of the car, the automatic transmission (it was a good auto but I bored of it quickly), the engine sound (or lack of), the typically underpowered German A/C, the amount of expensive tires I went through, the annoyingly long list of stupid issues that kept cropping up (warranty, but still...)
The mileage was a little bit better on the D, but not much in my mixed driving. If I was all highway, the D would beat it by more.