Trying to decide the right size MH for full timer

We started full timing twelve years ago with a 37' gas motor home. It was great, but the kitchen was lacking and the wind buffet could be tiring. We traded for a 40' DP eight years ago and have never had a problem with state or Federal parks in the central or western U.S. The only problem we've had is in the northeast U.S., where even private parks have smaller sites. I love the space in the DP, wouldn't want a longer or shorter rig.