I like both, but I've always leaned toward science fiction myself. I have an easier time finding deep and thought-provoking stories in the science fiction genre, and I tend to prefer its more emphasis on exploring what its possibilities mean and using them to examine ourselves.
Assuming you remember some stuff about the premise:
Wacky scientists built a planet sized robot to explore space as their planet blew up from a war
over oil.It’s revealed the little villager dudes are essentially maintenance nanobots for said robot. They forgot their purpose after first becoming self aware and later the Big Bad introducing a virus that ended up crashing the robot as it was returning to fix the homeworld. An island grew over the robot’s face and the survivors from its brain city did an anprim and settled the surface.
The story suddenly flips from saving and waking up the villagers’ god (who shares his name with both the island and the giant robot, wink wink) to fixing the robot and learning how to carry out its final mission.
It was really fun looking back at all the hints the story crew sprinkled throughout Bionicle’s 10 year run. Stuff like these bug dudes coming out of nowhere to wipe out the island and its villages - a poorly timed malfunction meant to clear the bot’s face for take off. The climax taking place somewhere that means “great heart” in the lore and where they basically do a little open heart surgery and shock him back to life. It only became obvious to most people like the moment it happened, which made the payoff super satisfying.