I'm a LECOM grad, and I did most of my rotations in Pittsburgh.
For FP, I am partial to St. Margaret (as it is where I am right now and I love it here). I did FP rotations at Mercy and West Penn. Both are really nice hospitals, and I learned a lot at both places.
I did surgery at Mercy. The attendings I worked with were really nice and didn't pimp during the OR time, which made it a lot more enjoyable (well, as enjoyable as retracting for hours can be.)
I did psych at Allegheny General. I am kind of lukewarm about that rotation. It was all outpatient psych, and I would have preferred to do at least some inpatient psych.
I did some medicine subspecialties (endo, rheum, and ICU) at West Penn. Once again, the attendings were great and I learned a lot.
If you go to Mercy or West Penn, you'll have a good experience - I didn't meet very many bad attendings or residents. And of course St. Margaret is the best of them all 😉