I understand why people think the "bus triad" are somehow lesser. But I really don't share that view. During my trips, I tend to visit most of the various destinations around WDW, and each of them typically more than once. At this point, I've hit a wide variety of resorts across each of the "areas" in WDW. While some things are very convenient from a particular resort, other things are very much not. No resort is close to everything, and over the course of the week the time and hassle factor tends to balance itself out.
As they say on the Transportation Board: "There is no pixie dust in transportation."
I think for many people it's just the fact that the resorts only have bus transportation, period. Most people would not say it this way, even to themselves, but I think at least part of it is "I'm better than Those Bus People."
Now if you are going to spend more than half of your time in any one park, then location starts to make a bigger difference. But that's just not me, and it never was. Not when I had small kids, and not now that I'm doing adult-only trips.