We are some of the few that stay on site and prefer driving to the parks. Our first MK day on this trip, we did the bus and just found it to be annoying. We didn't have a bad experience - the buses were timely, the drivers friendly, and we enjoyed chatting with our fellow POR guests. But it was just kind of irritating - it's nice to feel like you have your car as a "home base," I guess. So we drive to Epcot and our second MK day and enjoyed that much more.
Plus we love the free parking!
I find this post interesting as it is a conversation my husband and I just had. We went for a week last year sort of last minute when my husband was going for work. It was my first time staying off site. I was shocked how much more efficient it was to have a rental car. I have taken magical express and worried about making our breakfast reservation in time. Although it's a long hike to the car at MK, I think the remainder of the parks is easy to get back and forth to the car and other destinations. Although wdw isn't the easiest to navigate I didn't have much of a problem with Google maps. We just decided to go over thanksgiving this year and given incredibly affordable rental cars in Orlando we are absolutely get a car again.
As wish everything else on DISBOARD, personal opinions differ. Don't get me wrong, I have driven many times into WDW with a rental car. My wife and I just had this discussion the other too and concluded that if you one is staying on the monorail loop (GF, Poly, CR), then get a rental car (at least for us) didn't make any sense. It is a monorail ride to MK and EPCOT and only have to wait for a bus to AK or HS or DTD. If you are staying at any of the other resorts, then getting a rental car or not is totally personal preference. If you like having more of a freedom to come and go then absolutely get a rental car. If you are more for being casual and not caring too much on when the bus arrives or how long it takes to get somewhere, then the bus system is better. My wife and I, personal, are into letting Disney handle it plus we use the transportation system to our advantage...ie - park hopping (I know, that is totally a different discuss and not one I am starting here).
My wife and I are staying at the GF this December for a week. We have planned two days when we are hopping but the rest of the time is 2 days at EPCOT, 2 days at MK and 2 non-park days. We are going to AK for morning EMH and then EPCOT in the afternoon and the other day is morning at HS for EMH and then MK in the afternoon. Since you can't go from resort to resort, we find another way around it. The first day....take a bus from GF to AK and when ready to go to EPCOT, take a bus from AK to Beach Club Resort and walk in the back entrance at EPCOT. The second day....take a bus from GF to HS and when ready to go to MK, take a bus from HS to CR and walk to MK or bus to Poly or GF and monorail to MK (depending on which resort bus shows up first --- CR or Poly or GF).
For us this works and I know for others it doesn't. Also, it is just my wife and I. If we had a bigger family and kids, we would probably be getting a rental car and staying off the monorail loop. When I surprised my wife with a long weekend during F&W two years ago, we stayed at POR and used the bus system. Waits were longer but again since we didn't have pressing things to get to, it worked for us.
I love reading everyone's opinion and we have changed the way we do some things basis on some of these opinions. But if anything, it gives you a different way to think about things around WDW too.