Most Helpful Guy
The Lives of Others, In the Mood for Love, Infernal Affairs, City of God, P. T. U., The Proposition, The Devil's Backbone, City of Lost Children, Brazil, Rosencranz and Guildenstern are Dead, Yojimbo, Le Samourai, 8 1/2, La Dolce Vita, Seven Samurai, all of the Monty Python films.
Plus there's a ton of great action movies out of Hong Kong.
Most Helpful Girl
Seconding Pan's Labyrinth, The Devil's Backbone and Let The Right One In. Go for That Demon Within, Taegukgi, Ip Man and Hachiko if you like heavier stuff. Also, Kingsman and Three Idiots were fun.
For love stories, I suggest A Werewolf Boy, Shinobi: Heart Under Blade and House of Flying Daggers. Mind you, these are quite angsty.