My issue with the buses is not that they had bad service, but that the resort is so far away and it felt like I was on a bus a lot staying there. I have been going for over 20 years and always use the bus system. My stay at AKL was the only time I was sick of the buses.
I suspect that might be more psychological than anything. Animal Kingdom
looks far on a map, but average transportation time to the parks is right in line with what you'd get at any of the other resorts. Roughly speaking, Walt Disney World's main roads are laid out like a giant upside down T with an extra cross. World Drive forms the center North-South spine, while Osceola Parkway and Buena Vista Drive form the primary East-West routes. Animal Kingdom Lodge is on the southwest corner of property, but it also has immediate access right to Osceola Parkway. Other resorts might look closer to things on a map, but when you start winding through back roads and sitting at stop lights just to get to the main "highways," they don't end up saving you any time.
I've posted this in other threads, but I think it's worth sharing again:
Polynesian to Magic Kingdom: 13 minutes
Polynesian to Epcot: 45 minutes
Polynesian to Hollywood Studios: 20 minutes
Polynesian to Animal Kingdom: 26 minutes
Contemporary to Magic Kingdom: 10 minutes
Contemporary to Epcot: 34 minutes
Contemporary to Hollywood Studios: 19 minutes
Contemporary to Animal Kingdom: 25 minutes
Animal Kingdom Lodge to Magic Kingdom: 21 minutes
Animal Kingdom Lodge to Epcot: 20 minutes
Animal Kingdom Lodge to Hollywood Studios: 19 minutes
Animal Kingdom Lodge to Animal Kingdom: 18 minutes