Now, i might be projecting but I've always seen a lot of myself in Eric, which is why one of my favorite omgcp headcanons is ADHD!Bitty.
Please add to them if you have some as well!
Eric got diagnosed fairly early, but still late enough that his early school years sucked
And even when he did get diagnosed his teachers either didn't care or had no idea of how to help him
And trying meds only led to really bad side effects so he quickly stopped
Safe to say he struggled a bit (and the bullying didn't help that issue either, together with the whole internalized homophobia thing and good lord, someone get this boy to therapy-)
However, as he got older he kept researching and eventually figured out where he struggled and how he could help himself deal
This is also how he got into vlogging because he saw this one youtuber with ADHD who helped him a bunch but that's a different story
Eric has the more discreet kind of ADHD which means he's constantly in fear of people think he's faking it and doing things for attention because he passes as neurotypical most of the time
This also results in a lot of masking, to the point of where he doesn't even know he's doing it or how to stop it.
(Shitty helps him a lot with this by studying with him in either of their rooms and letting him experiment with unmasking and what unmasking actually looks like for Eric.)
(its a fun journey and he discovers that he actually stims quite a lot)
Eric is also one of those nd people who actually thrive listening to loud music
It helps him focus and he can't study without it
It also allows him to take a break from stimming which helps with doing assignment because more often than not his stims involve his hands (and you can't really write an assignment when you keep snapping your fingers and rotating your wrists in all possible directions)
The Big Bad gateway to self hatred and bad work ethics
Finishing assignments actually became such a struggle after his freshmen year that Eric decided to try meds again
Luckily for him, this time the side effects were much milder and they actually worked quite well for him
(The first day he took Adderal Ransom and Holster walked in on him crying while cleaning his room. It wasn't sad crying. It was oh-my-god-I-finished-my-assignment-baked-three-pies-AND-I-am-now-cleaning-my-room-I-have-never-been-this-productive-in-my-life-someone-hug-me type of crying)
Of course, the meds don't solve his problems, but they do help his overall regulation of his emotions and, for the most part, helps him keep deadlines
Now, he's still a very emotional person but at least now he doesn't have a burnout once every week
And his Rejection Sensitive Dysphoria is still thriving as always
(his first year was really tough because of this. Jack meant well but it was a lot for Eric)
His hyperfixations include baking (obviously), Beyonce (also obviously), figure skating (he still keeps up with his favorites) and, funnily enough, history (His thesis was picked very carefully)
As mentioned before, Eric enjoys loud music and he's fairly okay with sounds (he thrives in the locker room and on the ice, as well as in the Haus where its never quiet), but textures both in food and fabrics are a Big Deal to him
Velvet blankets? Get that cursed witchcraft away from him
Mushrooms? He can and will spit them out
Chalk? Absolutely the fuck not
However, he's weirdly okay with touching styrofoam? And doesn't hate the sound of it rubbing together?
He likes it a lot when Chowder comes around
Chowder, his sweet handsome son, has absolutely raging ADHD, to the point where taking his daily meds is absolutely essential
Eric doesn't really have that problem, he can skip a day or two and still be fairly functioning
Lets just say that him moving into the Haus was a very good thing because of supervision and people reminding him to take his meds
They bond a lot over their shared struggles, and Eric helps Chowder navigate school and hockey at the same time
This is getting off track, I can talk about ADHD!Chowder all day long
Shitty was the first person Eric told
The next day Shitty got him a stim toy and a t-shirt that had a picture of Raven from that's so Raven and text at the bottom that said "that's so ADHD"
Eric still wears it to sleep
The rest of the team reacted exactly the way Shitty told him they would, totally accepting
A few days after he told them Shitty came into his room with Jack in tow and smiled so wide while Jack said he was autistic himself so if Eric needed it he could borrow Jack's weighted blanket
After that day their relationship started to look like a friendship
And later when they finally began dating Eric got really good at revising his recipes while lying on top of Jack when he was having sensory overload, and Jack got really good at letting Eric stim with his fingers when he forgot his fidget cube
But I might add to it later
Please add something yourself if you want to!