I would like to add 2 absolute masterpieces of German cinematic creations.
First: Wir Kinder vom Bahnhof Zoo(W children from station zoo)
Devinetively not ab easy or joyfully film. So far I only watched the original version which isn't great in terms of story telling but it displays the reality of drug abuse(in this case heroin) in a very good way. This film is devinetively capable of ruining your day.
Werner - Beinhart( Werner and the wizard of booze)
A quite old(1990) animated film. It is funny as hell but you can clearly see, that it was made in a different time/society. However, its still funny as hell(at least in my opinion).