What is the most common kind of fantasy that clients request?

Dream is a category of speculative fiction that generally deals with futuristic and imaginative concepts such as innovative science and technology, area exploration, time travel, parallel universes, and extraterrestrial life.  https://catbitcoin.com/?p=1088 It has been called the "literature of concepts", and often checks out the possible effects of scientific, social, and technological developments.

Clients who ask for fantasy often want stories that handle sophisticated science and technology, space exploration, time travel, parallel universes, and extraterrestrial life. They might also want stories that explore the potential effects of clinical, social, and technological developments. Fantasy permits authors to check out these ideas in a safe, imaginative way, without the worry of realism getting in the method.