I'm Surprised it wasn't mentioned earlier, but "The Trip" is one of my favorite LGBT movies of all time. Its such a powerful story and I think it's just amazing.
Also the classics like....
~"Adventure of Priscilla Queen of The Desert." because it has a great tolerance message and a young Guy Pearce in his underwear, and a dress.
~"Nico and Dani" Its a foreign film about to teen boys that get together for a weekend and feel the effects of growing older and having varying interest in girls. Its a great film and the character work is awesome.
~" Bent" a tragic tale of love between two gay men while inside an interment camp during WWII. Its tragic and beautiful and the play is also outstanding.
~"Breakfast with Scot" because its such, again, a tale of tolerance. Two gay men in a long term relationship end up with a flamboyant gay ward and the film focus' on the relationship between the closeted member of the LTR.
I have a huge list of movies that I know well, and love. I have a thing for having movie nights at my house, and I especially love bad movies that were made on a budget of like 10 bucks haha.