VS-LHRCSA,
Having also worked for VS and having spent a lot of time at Newman House, I can certify that the ones that were going to go ''bad'' went so as soon as that red uniform went on...
Back on thread - my experience is the short-haul BA crew are much happier than the long haul. Last time I came back from HKG in C, I felt compelled to ask what I'd done to upset the FA who clearly didn't want to be there (late night in Lan Kwai Fong perhaps????). I got a glare and a grunt in reply...