US hasn't been flying where I've been going. I could do alternate airports but they add 1 to 2 hours drive time and, at this point, I don't think that it's worth it.
I've been mostly flying NW. Initially that was very, very good. They've cut back on in-flight service substantially of late which is bad. The US snack basket is definitely better than a bag of spinzels and snack mix. But drinks are still in glass which is good. And the coffee is usually decent -- especially compared to US'. NW's clubs are excellent! The F cabins in the Airbuses are all F16 and snagging an upgrade as a gold has been very reliable. And the 757s are F24. Upgrading across the pond, OTOH, seems to be a problem
NW's use of technology is light-years beyond anything US has done.
Would I come back? Perhaps, I've certainly got a soft spot for US, but US would need to 1) be flying where I need to go, 2) have reasonably competitive service, 3) do a lot to improve their e-commerce capabilities.