Maybe I'm just a bit of a cleaning geek, but whenever I use the plane's lav, I always leave it in the condirion I would expect to find it. Unfortunately this ususally means me cleaning the sink and picking up bits of discarded tissues etc. Some pax are just mucky. 99% of pax are very well behaved and couteous and are let down by the rude 1%.
My only gripe ever with CC is during a night flight and I'm trying to get some kip, CC can be heard moaning about their T % C's in the galley. Happens every time. It's as if they think your can't hear them. C'mon you know it's true.
Apart from this minor point, all CC are saints IMHO and I always try to be as courteous as possible to them. Flying is tiring enough sitting down, and sleeping, never mind being on your feet for hours on end.
Skintman