I really like documentaries, but they might not wear as well upon repeated viewings:
Our House: Stories of children who have gay parents
The Man You Had in Mind: 5 couples talk about their relationships
We are Dad: 2 dads who try to keep their 5 children together
Paternal Instinct: two guy's attempt at surrogacy
Foreign Films
Soft Hearts -- Much like Wedding Banquet, both of which I loved
His Secret Life - wife finds out about her husband's secret life
Mainstream Movies
Jack - A boy who deals with a marriage breakup because his dad comes out
Lost Language of Cranes - son and dad are gay, great Brian Cox film
Maurice - Set in pre-WWI England
Quinceanera - gay boy helps a preganant teen
Kiss Kiss Bang Bang - mystery with Val Kilmer
Gay
Get Real - boy falls in love with the jock who loves him back for a while
Guys and Balls - gay soccer team
Prom Queen - based on a true story of guy taking a guy to prom