I'm the opposite. One of my favorite things about a WDW vacation is NOT having to drive. At the end of a long, hot day at the parks, I love getting into a nicely air conditioned bus (as opposed to a car that's ben baking inthe Florida sun all day), sitting back and resting my feet and closing my eyes (rather than having to concentrate on driving), and being able to just relax and leave the driving to someone else for a change.
I don't find bus lines to be a problem EXCEPT immediately following something like Wishes when it seems everyone in the park is leaving at the same time. Although, I suspect that while I'm waiting in line for a bus there are others waiting in line for the monorail and the ferry, and then perhaps the parking lot tram, and then perhaps a trafic snarl at the parking lot exits?
Also, it's important to note that I have ABSOLUTELY NO INTEREST in leaving WDW property. I love being in the Disney cocoon. I have no need to see Orlando and vicinity and to meet the locals. I'm quite sure the only difference between me and people in Orlando is that I own more sweaters and they have a better knowledge of really big bugs.