Much has been written in eulogies today about Hawking's immense contributions to the field of physics, most notably his pioneering work on black holes and Hawking radiation, as well as his theories on the Big Bang and "imaginary time". It is perhaps lesser-known that Hawking was also a children's science fiction author, co-penning (with his daughter) a five-volume series about a young boy called George where he explores the universe in an exciting (and educational) manner. This series consists of George's Secret Key to the Universe (2007), George's Cosmic Treasure Hunt (2009), George and the Big Bang (2011), George and the Unbreakable Code (2014) and George and the Blue Moon (2016).
Contrary to some reports today, Hawking never appeared on Red Dwarf, of which he was a massive fan (particularly its episodes featuring black and white holes, and parallel universes). He did contribute to a documentary for the show's 10th anniversary in 1998, however, citing his appreciation for the series.
Of course, Hawking himself was an inspiration for many of today's science fiction novels and films, which namecheck Hawking radiation and use his ideas in how they depict black holes and singularities.
A man of tremendous mental powers who had a wicked sense of humour and was very much a geek, he will be missed.