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?
Warp Drive in Star Trek. Largely because there is modern day physics that points to the possibility of it being an actual possibility.
From a story telling, fits into the narrative version, the FTL in the newer Battlestar Galactica series. Look no further than the Battle of New Caprica. That was fracking awesome.
Alcubierre drive, my favorite too