As far as terrain goes you can't do much better than Blue Mountain. Blue and Elk take the cake when it comes to terrain in eastern-PA mountains. The 1000+ vertical is very nice for a local hill. The length of intermediate trails like Dream Weaver, Switchback, and Lazy Mile truly surprised me. This is not the straight up-and-down nonsense you find at other PA mountains, these trails felt more like blues you might find in the Catskills or even Vermont.
The double diamonds were nothing to write home about, but again its the Poconos. I was glad both Razor's Edge and Challenge did not have bumps on them, it made them into spectacularly fun "bomb" runs. We went on a Thursday and it was a little more crowded than I would have expected but the lifts at Blue Mountain are what really set this place apart from other nearby mountains. The high speed six and high speed quad move people up the mountain with ease and it doesn't seem to overly burden the elbow room you get going downhill.
Blue is essentially split into two halves, which spreads people around a lot better than many other PA resorts. The drastic improvement in trail design over other resorts like Camelback was easy to see. Camelback feeds most skiers in a predictable manner back down to the bottom of the mountain, that's not what happens at Blue.
I was very impressed with Blue. For its location you can't do much better in PA.