I'll be honest, I haven't read throught the entire thread but I think I may win the "obscurity" prize. Not necessarily a favorite at all, it's just the first Sci-Fi movie I remember ever seeing, and it was on TV way back in the 50's, in glorious living black and white. The envelope please: Rocketship RXM to the Moon
No idea who was in it and have only some very dim memory of it. I go all the way back to when "Tom Corbet, Space Cadet" was on TV. It was on back then somewhere among "Molly Goldberg", "Henry Aldrich", "Our Miss Brooks", "Man Against Crime", and "Lights Out", among others.
Anyone else know of it?