Action -- Series with high energy and plenty of physical stunts/activities.
Examples: The A-Team, Gotham, MacGyver
Adult -- Series with a high level of sexuality, and/or violence and is only meant for aged 18+ viewers.
Examples: Breaking Bad, Game of Thrones, Torchwood
Adventure -- Series with characters who embark on a long journey or treasure hunt.
Examples: The Librarians, Warehouse 13, The Young Indiana Jones Adventures
Anime -- a Japanese-disseminated animation style often characterized by colorful graphics, vibrant characters and fantastical themes
Examples: Cowboy Beebop, Dragonball, Ghost in the Shell: Standalone Complex
Children -- Series created for younger viewers for entertainment or education.
Examples: Aquanauts, Sarah Jane Adventures, Sesame Street
Comedy -- Series is humorous in nature
Examples: The Big Bang Theory, Coupling, Seinfeld
Crime -- Series with criminal activities and police investigations.
Examples: CSI, NCIS, Hawaii Five O
DIY -- Series is project-based and/or promotes do it yourself.
Examples: Ground Force, This Old House, Trading Spaces
Drama -- Series deals with a slow, but realistic development of character(s) and situation(s)
Examples: Downton Abbey, Better Call Saul, House MD
Espionage -- Series about spies and/or covert operations
Examples: Burn Notice, Man from UNCLE, Spooks
Family -- Series focus is mostly on a family unit
Examples: 7th Heaven, Gilmore Girls, Modern Family
Fantasy -- Series about magical worlds, beings, or spell magic
Examples: Hercules the Legendary Journeys, Merlin, Once Upon A Time
Food -- Series focuses on cookery
Examples: Good Eats, Great British Bake Off, Iron Chef
History -- Series is either about an historical event or has an historical setting
Examples: The Civil War, The Man in the High Castle, Victoria
Horror -- Series with a high level of scary events or shocking content
Examples: American Horror Story, Tales from the Crypt, The Walking Dead
Legal -- Series set in an attorney office or courtroom
Examples: Boston Legal, JAG, The Practice
Medical -- Series set in a clinic or hospital
Examples: Doogie Howser MD, Grey's Anatomy, NHS Rescue Squad
Music -- Series set around music or the music industry
Examples: American Idol, Glee, Nashville
Mystery -- Series with strange events raising questions and/or puzzles to solve
Examples: Magnum PI, Murdoch Mysteries, Sherlock
Nature -- Series focus is on animals and/or the natural world
Examples: Planet Earth, Nature, Wild Kingdom
Romance -- Series about love and/or relationships
Examples: Beauty and the Beast, Sex and the City, The Young and the Restless
Science-Fiction -- Series about otherworlds, futuristic settings, or fictional space exploration
Examples: Doctor Who, Stargate SG1, Star Trek
Sports -- Series set around any sport or the sports world
Examples: A Football Life, Baseball Tonight, Friday Night Lights
Supernatural -- Series about events, beings, or situations outside the natural world and/or defies scientific explanation
Examples: Grimm, Sleepy Hollow, Supernatural
Thriller -- Series with a high level of tension and/or suspense
Examples: Breaking Bad, The Expanse, Orphan Black
Travel -- Series about about vacation destinations, tourism, exotic locales
Examples: The Amazing Race, Great Hotels, Passport to Europe
War -- Series set during or around a battle or conflict
Examples: Battlestar Galactica, China Beach, M*A*S*H*
Western -- Series set set primarily in the latter half of the 19th century in the American Old West
Examples: Adventures of Brisco County, Jr., Bonanza, Longmire