I was going to say Sierra Nevada too. Also a huge fan of Yuengling
Not to rain on ya'lls parade, but we have Yuengling in great quantity down here in the south and I've not found it to be anything all that special. I really was hoping I'd like it more given that it's the oldest functioning Brewery in the US but I couldn't get in to it. Often, pubs that only carry crap beers will have Yuengling too, which in that situation is always a welcomed site.
Yuengling is not an excellent award winning beer but it definitely fills a void for me. It's more flavorful than light beers and still inexpensive. No parade rained on here. I'm from Pittsburgh too so after Rolling Rock left the town a lot of locals defaulted to Yuengling as the local beer of choice (I know it's made in Pottsville which ain't that close) which has always been popular. Here in New York it typically is priced at the lowest point with bud light et al (~$5 :-o New Yortk is pricey) so I'm always quick to scoop it up.