In general, anime can fall into one of five main genres:
- Action - Includes martial arts, fighting and "battle anime." Adventure is also typically lumped in with this genre since most adventure animes involve some type of war or battle.
- Drama - Includes romantic animes, as well as series that center around relationships, growing up, self-discovery, etc.
- Science Fiction - Includes futuristic storylines, as well as technology related animes and robot/mecha series.
- Horror - Includes true horror storylines (yes, anime has some pretty intense ones), as well as supernatural and occult series.
- Game-Based - The basic storyline focuses around some type of game - usually a card or board game, such as in Yu-Gi-Oh! or even .hack.
Within these main genres are sub-genres or "themes":
- Mecha - This refers to robot anime such as Mobile Suit Gundam and The Transformers.
- Magical Girlfriend - Anime shows with this theme typically center around a relationship between a normal human guy and a not-so-normal girl. She might be an alien, witch, goddess, demon or some other supernatural or superhuman being.
- Post-Apocalyptic - Deals with futuristic worlds after an apocalypse.
- Harem - A common theme where one guy is pursued by many females, as in Love Hina and Shuffle!. Incidentally, a Reverse Harem theme would be the genders reversed with one female pursued by many guys.
- Maho Shojo - Also called "Magical Girl," this type of anime features main female characters who possess supernatural powers of some sort.
- Maho Shonen - The male version of "magical girl" anime. This type of series features one or more main male characters with supernatural abilities.
- Samurai - Just what it sounds like: anime that centers around the infamous Japanese warriors known as samurai.
- Shojo-ai - Also called "girl love," this anime theme includes shows that deal with romantic relationships between girls without delving into explicit sexual content.
- Yuri - For some, Yuri anime is the same thing as Shojo-ai, but it's more often used to describe girl/girl anime containing more mature content.
- Shonen-ai - The male equivalent of Shojo-ai, i.e. romantic relationships between male characters.
- Yaoi - Yaoi is the more mature version of Shonen-ai and often contains mature sexual content.
- Hentai - This is basically anime pornography and contains explicit sexual content.
- Shojo - anime for young girls
- Shonen - anime for young boys
- Josei - anime for women
- Seinen - anime for men
- Kodomo - anime for children of both genders
The key is to read up on new anime before you buy and you'll have a much better chance of finding anime that's just right for you.

