Since college, where I was weened on the local brew; Rolling Rock, I haven't been much of a beer drinker.
My choice when I do is still local beers.
Rolling Rock and Yingling Black and Tan.
A while back, I use to go to a store that had a huge selection. I'd come home with a six pack of individual bottles just to try them. You know 6 bottles, six different brands. Expensive little game but what the hell, it was interesting.
After trying at least 10-15 dozen you know what my conclusion was?
Almost everyone makes some great beers except the big named brand American ones. Which include anything by Anhisier-Busch, Miller, and Coors.
Overpriced piss water.
One beer that doesn't seem to have an acceptable substitute is Guiness Stout.
But, I'm sure those on the other side of the pond will tell us that what they are exporting to us is crap anyways.