I definitely agree that the "airport versions" of Chili's, Outback, Friday's etc...are usually a joke. And an overpriced joke at that.
I think powerplantop also nailed it with many of these chains...."decent bar food". With "extra credit" for the Ruby Tuesday salad bar. Since I've already discussed a couple of Canada chains, I'll put Casey's, Kelsey's, and perhaps, The Keg in the same category. I'd also include Bostons...but they get "extra credit" for having fairly good Pizza (and lots of big screen sports).
Where I'll take issue is Cracker Barrel. I'm no fan, and I don't particularly like them for lunch or dinner, but I do think they serve a pretty good breakfast.