I actually do love PIT, but it's a shame that the place is so empty these days!! I've heard many stories about the PGH city taxes, and USAirways pulling out most of their routes. I also hear that SW is going to be pulling many flights soon as well.
The airport itself is great- there's a GNC, O'Charley's Steaks, and many great places to shop and kill time between flights. The whole place is very well-lit, clean, and upbeat. Also, there are a ton of TSA lines and barely anyone going through them, so it's usually a breeze! I wish PHL was as easy to navigate as this airport.
The only drawback is that this place is a ghost-town and many PHL-PIT flights are often full or oversold. However, it's still a winner in my books.