Tenchi Muyo!

Tenchi Muyo! by Masaki Kajishima and Hiroki Hayashi is an all time favorite, hands down. It brings back such great memories of when I used to watch this along with other shows on Toonami (which was sadly "killed" in 2008, however on Wikipeda.com it states: It is set to be revived starting on May 26, 2012 as part of Cartoon Network's Adult Swim block. Which means tomorrow! But this may all be completely wrong so  don't get your hopes up -_-).
      If you have no idea what "Tenchi" is then you must have been living under a rock for some years.

WIKI:

The original series began with a six episode OVA called Tenchi Muyo! Ryo-Ohki released in Japan on September 25, 1992. The series was released by Pioneer LDC in the United Kingdom on 1994. As its popularity grew, it spurred a seventh episode titled Tenchi Muyo! Special: The Night Before the Carnival  and a stand-alone Mihoshi Special. The second OVA series was directed by Kenichi Yatani and released on 1994, featuring episodes 8–13. The third OVA series was also directed by Kenichi Yatani was released on 2003, featuring episodes 14-19 followed by a special twentieth episode.
A twenty-six episode TV anime series called Tenchi Universe was released on 1995 retelling and expanding upon the original six-episode story, documenting in an alternate timeline the adventures of the cast as well as changing the back stories of some characters. Tenchi in Tokyo is another alternate version, chronicling Tenchi Masaki's move to Tokyo. Additionally, there are spin-off series (such as Magical Girl Pretty Sammy, Tenchi Muyo! GXP,  ), as well as adapted into manga. The franchise has also spawned soundtrack CDs and other merchandise released both in Japan and in the United States.

 Movies:

An anime film titled Tenchi the Movie: Tenchi Muyo in Love created by Hiroshi Negishi is a continuation of the Tenchi Universe TV series. A film titled Tenchi the Movie 2: The Daughter of Darkness was created by Naoko Hasegawa. A third film titled Tenchi Forever! The Movie is the sequel to Tenchi Muyo in Love and was adapted into a manga titled Tenchi Muyo! In Love 2: Eternal Memory.

Manga:

The Tenchi manga consists of two series written by Hitoshi Okuda: Tenchi Muyo! Ryo-oh-ki and Shin Tenchi Muyo! (which has no connection to the aforementioned Shin Tenchi Muyo TV series). They have been released in English as No Need for Tenchi and The All-New Tenchi Muyo!. It is based on OVA series 1 and 2. Since the manga originally began in Japan before the release of OVA 2, the OVA 2 elements are not introduced immediately at the beginning.
 
 (I was too lazy to reword that :P) 


Genre: Adventure, Action, Fantasy, Harem
  
Summary: 

Tenchi Muyo! follows the adventures of Tenchi Masaki, an ordinary teenager whose quiet life in the mountains of Okayama is shattered by the arrival of a diverse group of alien girls. Although having a bunch of beautiful women living at home might sound like no bad thing, Tenchi soon discovers the downside to this arrangement when the girls start using their special powers to fight for his affections! 
 
Watch it here on Youtube.com* 

Picture found on Google.com*
Summary found on TV.com*
Information taken from Wikipeda.com*