Would it be rude of me to ask why you're so obsessed with Sonic?
I really do not know the precise reason, genuinely, but I think it's a collection of things that's kept me glued to the franchise.
It's hard to compile all the reasons here as there's a lot more but here's some from the top of my head;
I grew up watching the shows and playing the classic games, but I was also interested with tinkering with computers as a kid which led to my playing a wide range of fan-games, which also led to me creating my own Rom hacks and fan-games.
There's something in the Sonic franchise for everyone, from gritty and dark to sweet and light-hearted, and that fact stayed prevalent as I grew up and my taste in content changed, if I wanted something gritty for example I could read Archie, watch SatAM and read some fan-fiction ("Where was my Hero?" for example).
The Sonic franchise is infinite; everywhere you turn, there's another large and deep rabbit-hole of information or another plethroa of fan-content surrounding that iteration of Sonic, and I used to enjoy learning as a child and still do now and that went hand-in-hand with that aforementioned fact.
Everything I get into I like to learn about it first and there's a lot and I mean a lot of Sonic content out there to learn about and I suppose that's what attracted me to the franchise a lot as a kid, if I ever got bored I could sink my teeth into another batch of Sonic flavoured SNCA and by God did I enjoy it.
The characters themselves are also a significant reason, there's something enticing about the franchise to both new and old fans, and a lot of that is due to the character designs and personalities alone; everyone has particular favorites, some for design alone, and others for the characters' parallels to themselves, I suppose.
The characters work so well together as their interactions are limitless while still working, and as a result I used to spend so much time
(and still do to an extent) imagining every scenario and iteraction between the characters and shows that my brain could muster.
Tails vs Shadow? Sure why not. What if AoSTH Sonic was in Sonic Colors? Sure, go ahead. It's truely endless.
I don't know how to phrase this exactly, but it's a combination of all of the other points because it serves as a base for it.
The franchise is like putty in that you may shape and imagine it as whatever you like, whenever you like.
That is precisely why there are so many fan projects, fan animations, fan stories, and fan-merchandise created by children, adults, and teenagers like myself.
I could ramble on about the music, the games and "muh shonen potential" but I'd be here all week.
I really apologize for the clutteriness of this post as some parts are really hard to follow but I actually got stumped trying to compile it neatly as there's too much to list.
On-top of this, I'm still groggy as I only woke up half an hour ago.