If we are not going to the parks it would be AKL. If we are going to the parks then The Boardwalk. We like AKL the best but it doesn't make it any easier to get to parks than it is at a value resort. We love being able to walk from The Boardwalk to two parks especially since we find ourselves going to Epcot most nights.
Grand Floridian is on my bucket list--but I have to say I really LOVE Wilderness Lodge and Boardwalk Inn as well. So while I would like to stay at Grand Floridian at least once in my life, I think BWI and WL will be the ones that are "home" to me.
Boardwalk Inn Club Level. We love the theme, it has THE best slide on property, you can walk to 2 parks and the Innkeepers Club is our favorite of the Clubs we've tried.