Just changed to the MK6 after 5 years in a MKV (loved it)
Just seems more of the same but better:
Better finished inside.
Seats more comfortable (both had cloth)
Nicer exhaust sound.
DSG down changes much faster, box seems more responsive.
Seems to tuck in better on fast corners when pushing on, probably the XDS working.
Rear LED lights (oh yes I added those

)
Reversing Camera (oh I added that as well!!)
No problems with the paint, looks no different from the MK5
Black inserts in the Monzas look well with the red car.
Things not so sure about..
Air vent reflections in the side windows, might look at getting black surrounds.
Miss the dipping left hand mirror, used to be standard.
Tyre pressure monitoring system used to be standard as well..
Where did the rear cargo net go.
"D" mode in DSG is more like half sport now. Liked the lazier changing of the previous one as I only used it in traffic.
Rear tinted gangsta windows.