Which roofing shingle manufacturers do you prefer?

Hi folks, looking for a little advice here.

I'm curious - which shingle manufacturers do you prefer? i.e., Certainteed vs. Owens Corning vs. GAF.

Or if you don't have favorites, are there manufacturers you would say to definitely steer clear of? 

I always used CertainTeed and like them.

But lately we have been selling more Atlas shingles and am very happy with them.

GAF , Certainteed