If I wrote a horror movie It would be like:
 Kid:moOOoooom there's weird shit happening and there are sounds in the basement
Mom: it's that damn phone you watch too many horror movies
Kid: ...I didn't even say it was a ghost it could be rats
Mom: how dare you speak back have you no respect!?
Mom: Did you just sigh at me!?!?!!?!?!?
So anyways The kid like horror movies but hates them at the same time. They mainly watch them for the thrill but none of them are really thrilling just stupid jumpscares, So they're basically an expert!
But horror movie ghosts are different and the kid realizes they can't use the methods in the movie and that this ghost doesn't just feed off of fear. The ghost doesn't even seem to have a reason for why it's doing it!
 Eventually kid finds out that the house was a serial killer's house or sumn and the ghost is the serial killer's ghost and they're probably going to get killed the same way as the serial killer normally kills people and the kid is like dammit mom and dad why'd you have to buy this house when it was priced so low!?
The serial killer probably has sad past Maybe kid tries to fix stuff but obviously killer ghost doesn't care.
 Also the kid isn't like AAAAAAHHHHHH AAA AAAA AAAAAA no they're just like What? You wanna kill me? You think I care? Hell naw, the only reason I'm doing this is because if I die I wanna die without some sort of ghostly force murdering me.
Or alternatively instead of a serial killer or something weird maybe the PHONE could be haunted! So technically it IS that damn phone! :D
And if i wrote a horror series:
So mc Is pretty smart, not an idiot Doesn't just run into danger while MC's bestie LIVES for it. So MC's bestie Is obsessed with all things horror and drags MC around against their will.
MC usually keeps their bestie alive.Â
Bestie: ahA I'd make such a good horror protagonist!
MC: Yeah, you would... a good cliche one...Â
Bestie: Youre just jelly!
Bestie: Oh. My. God. LOOK AT THAT CREEPY HOUSE! IT LOOKS JUST LIKE IN THOSE MOVIES WE SHOULD TOTALLY GO IN
MC: ARE YOU TRYING TO DIE!? FORGET GHOSTS THAT HOUSE COULD COLLAPSE ON YOU
Bestie: Ugh don't be such a chicken come on
MC: I'm not being a chicken I'm trying to stay alive and I suggest you do the same!
Bestie: Would you really leave your poor defenseless bestie to die in the house alone??? Come onnn it'll be fun
 ...But you will probably die and then you wouldn't be able to give me the 5 dollars you owe me...
Bestie: Aww come on I know you love me you don't have to act all grumpyy!đ
 MC: Don't make me let the ghost kill you! >:/
So they do that and end up collecting stuff from their adventures.
And that plays some sort of significance in endgame, I dont really know-
I just made these from boredom, interesting ideas ill probably come back to them later...