Myself personally;
* The reflections on the front of a Gallardo when in bonnet/hood view, other cars including players, road markings etc are shown very clearly. You can even see the headlights of cars coming towards you.
* Driving in a group with road rules and looking behind you and seeing a sight that could easily be out of the Gumball.
* Driving through the middle of traffic in a car or bike with only inches to spare at crazy speeds.
* Actual dials for the cars/bikes in all views as well as an actual rear view plus amazingly detailed interiors and engines (usually).
* While in convertibles, being able to look up at an overhead plane or just look up while driving, very surreal experience when on a long stretch of road and all you see is trees and road signs.
* Being blinded by the sunlight when looking behind you then in front again or like myself and baldy had last night, going along a long stretch of road and the sunlight acting almost like a strobelight due to be constantly hidden and reappearing by trees.
* The driver views on bikes, amazing sense of speed.
* The ability to drive anywhere when you want.
There's more I'm sure but these are the main things for me and always make me smile especially.
+rep on the thread idea !