MEM (home base for me) is a decent airport...easy to find your way around, small enough that you can quickly go from one end to the other. Decent local food options (Interstate BBQ). But IMO you don't want to do longer than a 1-hour layover here. Climate control in the terminals sucks and the gates are not comfortable at all.

I always find it hilarious to watch the John Grisham movie "The Firm", filmed in 1992-1993, and see the airport scene (when the Chicago mob guys arrive in MEM). Nothing has changed, the airport still looks exactly the same.