"The sci-fi genre has seen seismic shifts through the decades in terms of style, themes, and content. Films have run the gamut from dark dystopias to thoughtful, psychological trips to campy action romps.
Though the genre's moved in a somewhat more thoughtful direction with films like The Matrix and Inception, there's a certain unique appeal to the more basic, schlocky movies as well. Often viewed as "guilty pleasures" at best, this brand of sci-fi may not be the most nuanced, but it can still be a lot of fun."