I would think most DLR vets would actually spend more time at the other parks because they are more unique to WDW than MK. You might consider hotels in the EP area (Beach Club, Boardwalk, Yacht Club) because you can walk to EP and walk or boat to DHS from there. We haven't stayed at any of those resorts, but I've read that their bus service to MK is less than desirable. Personally I'd probably go with a more centrally located resort that has decent bus service to all of the parks (Port Orleans Riverside for a moderate or Old Key West for a deluxe). You might consider Wilderness Lodge, which has a boat to MK and decent bus service, although it's similar to the Grand Californian.
Nothing is walkable at WDW like it is at DLR. Yes, you can walk to MK from the Contemporary or Bay Lake Towers, but that's the only park you can walk to. It would be a shame to go all the way to WDW and spend most of your time at MK. Just go to DLR if that's the case (and don't get me wrong, we love MK, but the same rides are better at DL)!