Flying out of KEDN (Enterprise, AL), the area is crazy busy with rotor wing traffic. If you look at a map, you don't -need- to talk to anyone, but I usually get flight following so I wanted to call up Cairns Approach. It was busy enough I had to wait, and some of that was warnings to military guys about the aircraft departing Enterprise, climbing through 1200, northbound. Me.
As busy as they were, they seemed happy to talk to me, and immediately started vectoring me around other traffic. That may be an argument against flight following for some, but in that environment especially, I didn't mind at all.
The Altus TRSA seems to be a big "please talk to us" sign. You don't have to, but why would they put that there? They could have gone with just a class D. Instead, there's this big area in which you can (but don't have to) get traffic advisories.