Minecraft or Fortnite
Definitely Minecraft.
I find Minecraft very relaxing.
At Fortnite I don't like building walls, I prefer to stick with "normal" shooters.
This is a real computer game
Minecraft is logically a great game but I lack fun replayability. Creative mode quickly gets too boring for me to continue, and survival mode is not the biggest thing in my opinion. If you have played it through once, there's really no reason for me to repeat it. Although you like to take a look at the new updates, there really is no change in the gaming experience and you often play through the game with your friends within a single day. I also loathe Minecraft's endgame and find it much less mature than in games like Satisfactory or Terraria. My favorite activity would be to play very specific modes on servers. It can always be a little fun with friends.
Still, I prefer Fortnite here. I enjoy the aesthetics of my own game character, but that's rather a low plus. In a way, it feels less luck-based than some other Battleroy games because you never run out of cover because of the build function. The weapon selection is finally mature in my opinion after two years. I also find that there's less lack of replayability. I often only play the main modes for half an hour a day, but I'm still motivated to spend half an hour every day. With the right friends, this time doubles quickly. Then there are the almost weekly updates that add up to one or more game hours. Especially when it comes to my favorite game modes, I can't help but search all day. The game's creative mode is also great and pretty mature after several months of its release. I love to design maps myself. I can do that much better there than in Minecraft, because to develop a mature game mode, you need a lot more experience and time than in Fortnite. And the creations of others are sometimes extremely fun. Finally, I personally find it very pleasant to complete missions that have been commissioned. It just feels good.
These are 2 completely different games. I can't start with Minecraft because it's not my genre either. Fortnite isn't mine now, but I would prefer it subjectively. Still both great games.