This can be anything from Hyperspace in Star Wars, Warp Drive in Star Trek, travel through the Warp in Warhammer 40k or anything else.
I’ve always liked “slow” FTL travel, where going a few light-years still takes a few days or so. I also really like travel through an alternate dimension like in 40k, Event Horizon, Witchspace in Elite Dangerous.
I wanna know your favorite versions, or do you prefer stories that obey the laws of known physics, like the Expanse or Rimworld?
only trek and sg1 try to explain it in a scifi/pseudorelistic way, all others avoid, because they dont want to have to explain in a real way that would have to add real science to the discussion. BSG avoids it altogether, somehow the series, the humans and cylons suddenly had the tech out of the blue.