I too have an OTA antenna, which I put in the attic. Because all of the TV stations are in the same vicinity of each other I can just leave it and get around 40 stations. I hook it up both ways, through the Hopper and straight. when I go through the hopper I get the EPG on most of the station, and some of the .1.2.3 stations that are not even offered by dish.
I wish they would fix the option where you could manually add a station, but it looks like that will never happen.
Anyway, the reason I do it is like another poster said, living in Tornado Alley you really need OTA should Dish go out, and you can also get your locals when Dish gets into a dispute with the local stations and drops them, which happened during football season one year. Had it not been for the OTA, I would have been irate, as it was I was only annoyed.