[readonlybarbie]

While I agree all of these scenarios are good reasons to leave, I have a feeling (based on being an American for all 30 years of my life now), these answers would be classified as "TOO REAL" and as a result you might be filtered for "culture fit" aka manager doesn't think he/she can control you.

[joezydeco]

I agree, but at that point if they're going to make this kind of observation on my resume ("hmm, you move around a lot"), the reply is going to be of equal tone ("I move around a lot because the companies I choose tend to make bad decisions and change direction with equal frequency").

There's nothing much to lose by that point.