Great post, but I doubt I'll use most of the settings. Normal, Normal, Normal with Comfort steering seems to be just fine for me. I do leave it in 4A, mostly because it defeats the automatic engine shutoff. I notice no difference between 2WD and 4A at all. They feel exactly the same to me. I do put it back in 2WD for highway driving.
I am confused about the traction control button. I have not found that on my truck, but it's a base 800a (Quite rare, if my search for a used one is any indication, and just what I wanted: The less tech, the better), so maybe I don't have one.
I am a set-it-and-forget-it kind of guy. Not going to do anything off road except for unpaved roads and easy trails for sight seeing, and then getting around on hunting leases. Zero interest in going fast or crawling over rocks. In snow - I just made an offer on a Colorado property at 7K feet elevation - I'm sure the standard 4x4 settings will be fine.
The truck is definitely overkill for me, but I really love the ride, and disregarding potholes and speed bumps is nice.