I am surprised that in this long running thread, there has been little or no mention of four of my favorite Francis Ng films with some of his best performances for drama, comedy and romance:

The HK Triad (1999)
With his pal Lau Ching-wan. He dies in a heroic self-sacrificing manner.

Bakery Amour (2001)
He gets the girl! And it's Michelle Reis!

Beauty & The Breast (2002)
He gets the girl again! And it's Michelle again! An underrated gem. Kozo got it wrong on this one.

Crazy 'N The City (2005) Top notch. He gets knocked on the noggin but survives and gets the girl!

Check them out. You will not be disappointed. ;)