Well, I recently watched “Poultrygeist: Night of the Chicken Dead” and that one definitely did it. Troma movies in general really brighten my day.
!!
R.D.B:
I guess miserable (and superficial) films about abortion make you happy.
Edwin:
I think I’d prefer “Immoral Women” instead of “Immoral Tales”. The young lady at the end of the former just seems so happy with her pet doggy—imagine the enchanted evening that followed!
Really, though, the first film that sprang to mind was “Daisies”. I saw it at the cinema and after the end, I sat in a state of gorgeous bliss, looking like a Cheshire cat, absorbing the brilliance of what I’d just witnessed: a quite extraordinary film.

so far…It’s a Wonderful Life, Modern Times, City Lights.. etc
The Toy Story films and “Mr. Smith Goes to Washington” doesn’t leave so much a smile on my face so much as an overwhelming sense of pride.
Pretty much anything Miyazaki. Except Princess Mononoke. Probably his best film, but kinda depressing.
!! this film is almost an" roman a clef " of fassbinders creative process and his relationship with his acolytes!
Light Sleeper, The Dark Knight and more recently Last Tango in Paris and Red Beard.
Charles:
“Last Tango In Paris” leaves you with a big smile on your face?
“The Dark Knight”?
Pretty much downer films, don’t you think? Or are you smiling because of what you perceive to be their brilliance?
The big lebowski, of course.
The Wizard of Oz.
Sabrina , Holden, Hepburn and Bogart
Love and Death
Casablanca
THe Sting
THe great Escape
The original Ocean’s 11
True Grit
One flew over the Cuckoo’s nest
Horsefeathrs
There’s more.
@ MARK D VANSELOW
That and I tend to find a lot of personal optimism even in the most abysmal corners of the dark.
I’ve even gone to bed to Under the Volcano some nights because I find the beginning to be rather quiet and soothing (past the credits that is), even if it leads up to a downbeat day ending with a tragic night.
the private life of a cat
The Man Who Laughed

Corinne
My Nights Are More Beautiful Than Your Days