I could see any of them and I myself enjoy future settings that mix magic, psionics and tech but the trouble is getting the mix just right and if you limit it to a planet, system, galaxy, dimension, etc and how you get to said places or can you get there by magic, tech and psionics.
Yes you can have a post apoc world/setting like W40K, Shadowrun and Dominion, a Firefly type setting, Farscape, Star Wars and some of the strange stuff on Star Trek. I generally prefer my future settings based on hard science (with a lot do not like) or way out there with magic and psionics.
MDC