I love Firefly for what Joss Whedon does best: bring together a disparate band of rogues with very different interests and turn them into a family. It ran for one perfect season (damn you, Fox!), and in a meta act of rebellion that led to ultimate victory, fans petitioned in the days pre-Kickstarter to bring the show back for one epic movie, Serenity.
There's no denying that at its heart, Firefly is a story about lost rebellions and the small acts of resistance people engage in in the fight to retain their independence. It's a story about social justice and unlikely heroes, about how even those broken down by lost battles maintain the spirit required to win the larger wars.