From my point of view, the biggest disincentive to visiting the US, is the abysmal way people are treated at US immigration.
They are herded like cattle, shouted at by those marshalling the queues, [and boy are there queues]. Then they are treated like criminals by most of the immigration officers on the interview desks.
I don't want to upset my friends in the US, and I may have been unlucky, but I know that's the bit of any trip to the US that I dread most.

JM