What settings to get ACC to behave more like a human on the highway?

[NewbieScoobie]

I find autopilot pretty good on the highway, its mostly confident. Setting a longer follow distance (like 7) really helps smooth it out.
Some people get really annoyed at folks pulling into the gap it leaves when you do that, but I really don't care. Its not that important to me.
I know some folks who get so annoyed that they have it set on 1 or 2, but that just makes the car brake harder so makes it worse not better.

I actually find that this makes things much worse because when people inevitably cut between you and the follow car BOOM hard brake.