10. Tenchi Universe
The series premiered in 1995 in Japan and hit the US in 2000 on Toonami. It's 26 episodes and is loosely based off of the Tenchi Muyo! OVA series. What's it got? How about a mild-mannered Tenchi, who is in early adulthood and is living it easy, until he meets the terrible space pirate Ryoko which sets off an intergalactic adventure while six beautiful women from space all hilariously vie for Tenchi's attention. This is, of course, any teen boys dream.