Almost all science fiction that involved things and themes relevant to futuristic technology, and trans-humanism such as cyborgs, robots, androids, automatons, artificial persons, artificial intelligence, nano-machines, "drones", extraterrestrials and other various other world life forms, outer space or space travel or exploration as well as time travel and exploration, and deep underwater exploration. And anything apocalyptic or post-apocalyptic with some exceptions for "zombies", which I'm not really too into for the apocalypse or armageddon genres. Alternate dimensions and alternate timelines and realities sci-fi themes sub-genre or otherwise also are intetesting to me.
Or even movies that have some really really Fucking Bad Ass Anti-Heroes (or Anti-Heroines) as their central main character or protagonist (s) of their main plot lol
As for fandom in particular, I've always been a fan of the Alien, Predator, Terminator, and "Doom" franchises, and I also liked RoboCop (original 80's version, haven't seen the reboot), Starship Troopers, Tremors and numerous others that I can't all fit here in a single response.