Gonna be honest... Meta stuff made me so jaded. I think Justin Roiland, Dan Harmon, and Marvel killed it for me. Deadpool annoyed me at first, but it took me a couple of watches to be like "OHHHH I GET IT!". If you think about Deadpool, you think about how ridiculously nerfed he is and how his whole plotline is f'd up where he just wants to be freed from a cage. Although heads-up, I don't think I'll ever fully love the character since he gets on my nerves with his Reddit humor.
SPEAKING OF WHICH if you do it incorrectly you could ruin tension of an entire story's narrative like Rick & Morty ("Once he reveals he's evil Morty, I'm out!") or She-Hulk (the whole K.E.V.I.N. twist). Like I get She-Hulk does it in the comics and it is accurate to a certain extent, but she's just a total sociopath in the show and her knowledge of the universe does make certain scenes a little more f'd up. (Good for the writers of Rick & Morty getting jobs, but... man... they are not doing it for me in Phase 4).
I guess you can boil it down to that archetype. Smug sociopaths who know more than the world that I'm sick of. That and it breaks worldbuilding for me.
I'm sorry if I sound really jaded here. I will say the meta stuff I liked because.
Gumball is really creative. Like how they find ways to change their voice actors. I love it when sociopathic fourth-wall breakers are reminded of how small THEY are in the grand scheme of things. Like the Decreator episode in Doom Patrol where Mr. Nobody begins to have this little freak-out when the Decreator is unleashed (Mr. Nobody felt like a jab at that archetype). Deadpool talking to his wife in the afterlife.
Also Sonic Boom giving me the greatest fourth wall joke ever don't @ me.
As for my story, I would call it meta. I think I regret making it that way to a certain extent (there are some jokes I'm tired of), but hopefully I can improve upon certain aspects in Season 2. There is a line that I made me a little angry that I wrote it "Why am I stick figure again?" "Because the artist needs to rest".