Never flown Southwest, so can I go with their European cousins easyJet please. Had a brand new 737-700 last week, very friendly crew, fare of less than £20, multilingual captain (with a Manchester accent) and on-time departure/arrival - on a French domestic sector. Air Lib Express have got a lot to learn!
Best full service airline Virgin Atlantic though being a prostitute to OnePass it is great they codeshare with Continental.
BA are still there or thereabouts, but the All Day Deli concept is rubbish.
As for airports - DTW old terminal was slated but I never had a problem with it. I guess most hub/major airports are OK if you are a frequent pax and get used to them, layout, idiosyncracies, etc.
WT
<just a punter>