Monorail
The most spectacular way to travel within Walt Disney World is via the Monorail! The compartments are usually less crowded then the buses and the air conditioning seems to be more reliable then the buses.
The Monorails stations are usually closer to the parks then the bus stops, but what energy is saved in distance is often lost in climbing the 2-3 story ramps up to the train platform.
Overall the Monorail experience seems to be much more civilized and refined then traveling on the bus system.