Most regions along the Mid Atlantic and Northeast have some heavy breaks...

I wouldn't necessarily claim that Hatteras has the heaviest tho...

Because of its location, Hatteras does pick up a lot of swell, and may be the most consistent east coast area. And, one very noticeable difference, is on the longer period ground swells, the continental shelf plays less of a role on offshore swell decay - so hatteras will often pick up the ground swells bigger.

On the negative side, Hatteras does get maxed out when there is a big enough swell, where it breaks way out on the outside bars.