I can tell you one that is NOT malignant.
George Washington University Hospital seems to have a large group of really happy residents. I'm noticing that this is a rare occassion so I figured I'd mention it. I just noticed it b/c I was once on an 1 month away rotation there.
I think in general it's fair to say that ob/gyn residents are 50+% unhappy. I kind of expect it but that's just me.