[Tepix]

I'm not sure if the roof construction is the same in the US and in Germany.

Pitched roofs do well against storms (30° roof slope is best).

Luckily, we don't have deadly hurricanes.

[Amezarak]

Nearly all house roofs are pitched, at least in the southeast. I have never seen one that wasn't. Very sharp pitches are more common in newer homes, though, in my experience.