I too thought this was going to be about cars, lol. Anyway, I use either shutter priority or aperture priority mode 90% of the time. If I'm shooting something that's moving, the camera can adjust exposure much faster than I can. I really don't ever use full manual mode unless I'm doing macro work off a tripod. The priority modes allow you to compensate exposure up and down in 1/3 stop increments anyway, so you can still set the exposure you want, but have the camera adjust quickly to changing light.