OTA HD looks good as long as there isn't any sub channels, but almost every channel has at least one sub now, there are only a handful that don't.--In need of a Vegas vacation.
In LA CBS and Fox HD OTA look pretty bad.
Fox looks bad in every market because it is only 720p.This is why ABC also looks like shit.
Fox looks bad in LA because OTA has bad compression artifacts, not because it is 720P. It is like they make it look bad on purpose. Sports programming looks particularly bad.