As for the Topic of the Day....
Hmm...
As for first horror movie, well... The one that sticks in my head is "Trilogy of Terror" - it was shown as part of the afternoon movie series on Channel 7(?) in New London, CT, when I was nine. The first one I can remember seeing in a movie theater would have to be "The Amityille Horror". Or maybe "Poltergeist". -I'm too lazy to check the IMDB right now for the release dates.
As for my first sci-fi movie, well... I guess it was "Star Wars"... OH! Actually, it was "Close Encounters of the Third Kind". -Although, I'm sure I saw a sci-fi or two on the Tee-Vee before then.