Another vote for MSP. I think the only people ragging on it (without specifically analyzing potential gate locations) are people I would guess have only flown through it a couple of times and had bad experiences. Yes, it's not as symmemetrical or parallel as ATL. However, the operations issues at ATL have been pointed out repeatedly and would be a big concern. There's also the issue of how crowded the concourses get in ATL because of the lack of moving walkways to keep people clear. All you need is one oversold flight in a delay situation to have a bunch of angry passengers blocking the area you need to get through to slow things down. If you have trouble reading maps, go for ATL, but if you can look at Sky magazine's map in flight and figure out what your options are when you hit the ground, go for MSP.