Goo wak chai 3: Jek sau je tin

This is unquestionably my favourite in the YnD series - and I'm a huge YnD buff. You have all the "stars" of the franchise here, Chn Ho Nam, Chicken, Stammer, the priest, but also great support characters played by Anthony Wong Chau Sang and Karen Mok, probably the two best HK actors of their generation. You have a bad guy who's really really really bad, and you have that sense of a documentary film about a Hong Kong which does not exist anymore, already after the British colonial period, and still before the Chinese takeover (and there's quite a few humorous lines about that in the movie). A Hong Kong society that almost belonged to itself. OK, the storyline is in fact a direct copy of the first film in the series (they just changed the characters and locations), but you won't notice unless you're a real expert of the series. I miss those times.