Disney transportation will take you anywhere you want to go on Disney property.
But certain trips will take TIME, and time is a precious commodity to me on vacation, so I drive everywhere.
Driving myself takes less time than waiting for a bus, boarding the bus, waiting for the bus to arrive, and getting off the bus.
Driving myself means I never have to stand up - there is always a seat available in my car, and never anybody to give me the evil eye if I don't hop up and offer it to them.
Driving myself means the only B.O. I smell on the way back to my room is my own. And I bathe and use deordorant, so it's not that bad.
Driving myself means the only screaming I have to hear is from teh radio - a radio where I and I alone control the station.
Driving myself means I can crank the A/C as high as I want it.
Driving myself means I can go anywhere I want to go, no transfers, no waiting around for a second bus, no 90-minute travel times from one resort to another. And if I decide I want to go off-site, I go; no waits, no taxis, no questions.