If you love the artistic and non-mainstream risks taken by art-house films, then Young Ones belongs on your watch list with other indie Sci-Fis such as Lars von Trier's Melancholia, Juan Solanas' Upside Down, and Terry Gilliam's The Zero Theorem.
A gritty film about pioneers in a drought ridden landscape, it's a futuristic dust bowl tale as grim as Grapes of Wrath. It's memorable and keeps your attention, while portraying Sci-Fi in a very believable way. The mix of poverty and high technology, the extremes of the haves and have-nots, and water shortages in the US, amplifies the current state of a society as all good sci-fi films do.
Good actors and acting, and gorgeous to watch. What's not to like?