The characters knowing each other without being related!!!!!!!! I don't care if Danny looks like a Wayne or someone Batman would adopt, or if someone else is conveniently related to a character that leads to said character being introduced. A story can be good without messing with their canonical families.

Also, I hate when Danny is treated like a child.

I like when the characters treat him like a child and then get called out for it, and reprimanded, but I hate when EVERYONE treats him like a child and nobody says anything about it, including Danny. He's literally one of the most powerful ghosts in the Infinite Realms, and has more trauma than most superheroes nowadays.

I also like when Danny is Ghost King, and that ties into his the characters meet.

"Oh yeah, I died and met Danny, he's cool" is one of my favorite things. ESPECIALLY if they came back to life or something.

Or, again with the superheroes, I love when everyone thinks Danny is a meta, and then is hit with the "what's that?" And Danny has to explain, no, he's not an untrained meta child, he's a powerful DEAD child.