Favorites mentioned in thread already:
Victory's Hop Devil
Victory's Golden Monkey
Leinenkugel Summer Shandy (although I feel it is a guilty pleasure)
Sam Adam's Noble Pils
Stone Arrogant Bastard Ale
Some stuff I haven't seen mentioned yet, may just have missed:
As far as Yuengling goes, I live in South Jersey about 10 minutes from Philadelphia so at least 95% of bars carry it. It's OK. It's not awful but I think a lot of people order it just to not order Bud, Miller or Coors. I'll order it if it's on special and I'm not in the mood anything but that's normally about it.