Well, Pittsburgh is a yucky town, but a lot of people find it fascinating.
When you are in VA, steer waaayyy clear of I95 unless you have a puptent, a couple days worth of snacks/drinks and an endless supply of reading materials. The traffic never moves on 95.
PA has Gettysburg, which would be awesome.
I think you should keep driving once you get to VA till you hit the Outer Banks of North Carolina (OBX) since it's my absolute favorite place in the world.