QX hands down for me. On Q400 flights I have always found the pilots go out of their way to make you feel valued, today on RNO-PDX the pilot did a half circle around Crater Lake so people could get a great view. The cabin crew on Q400's also do an outstanding job with the free beer and wine.

On the E175 I again go with QX. I think the F service is superior to even mainline (obviously not the food part) and as I recall the QX 175's have bigger ovens than the ones Skywest operates. Skywest crews are fine but since they work for AS, DL and AA service can be more spotty.