I've got a 50mm prime which has become my workhorse. I also have a 60mm macro and a wide angle (which is great for shooting multiple cars in a line).
Just for fun I just ordered a Holga, medium format film camera. I can't wait to play with that for some vintage style MINI shots.
I hear that the photo event with C3M next weekend is being rescheduled.
I'd love to do more with the cameras and our cars. Like Craig I'm playing with the manual mode more often lately. A friend of mine taught me a decent trick to shoot a few shots on auto, take a look at it, see the settings then go into manual and adjust from there.