It's no secret that I am a science fiction fan. When dating my wife, one of our first kisses was from me becoming overjoyed after I found out she stayed up too late the previous night watching a "dumb movie" on the SciFi channel. In my book, a girl willing to lose some sleep watching science fiction on TV was a girl worth dating.
One thing that has always made me uncomfortable with science fiction is when science doesn't support what's happening in the story. So for instance, in Star Trek I could always buy-off on the science behind the crew's planet-to-ship handheld communicators and even the ships transporter (which turns matter into energy and then energy back into matter). But the concept that humankind in a few centuries could build a ship that traveled faster than the speed of light is pure fantasy. Fantasy doesn't make a show less enjoyable to watch but it's not science nor grounded in reality.
When I was eleven years old, there was a television show called Salvage 1 starring Andy Griffith. The premise of the show was focused on a salvage man's dream to build a rocket, go to the moon, and bring back to Earth the old Apollo mission "junk" for resale. While his character's use of a semi-truck cement mixer for the capsule or that a salvage company had the resources to build and launch a rocket seemed far-fetched...I could buy off on it.