If I may be so bold ...
I was brought up in gay culture (my brother came out when I was very young), and would like to chime in, if I may.
Totally second "Torch Song Trilogy", and "Sordid Lives".
Also, did anyone see "Girls Will be Girls"? I love, love, LOVE that movie! Very, very campy, and some flawless performances by some wonderfully talented female impersonators imho.
I saw "Another Gay Movie", and while it was cute, for me it quickly degenerated into "just another addition to the spoof movie genre". My brother thought it hilarous. <shrug>
"Cabaret" is a must-have for anyone - lbgt or otherwise.
"Parting Glances" was a good movie for it's era. It was one of the first films in the 80's to tackle the AIDS pandemic. I don't know how relevant it would be for a young man these days (or if the movie can still be found), except to know how far we have come.
Of course there's "Mommy Dearest" and "Whatever Happened to Baby Jayne" and all the rest of those.
And finally, I will always have a special place in my heart for anything John Waters.
Again, this is all just my humble opinion, and only a few of my faves. They were presented to me over the years as "must sees" by my brother, his friends, and my friends. I may think of more....
-Sherri (checking the lists of others to see if there are any mentioned I haven't seen)