Do you know any good spike quits stories.

7874629
Depends: What do you mean by "quit"? Becuase he technically doesn't have a job, he's "just" Twilight's assistant... so are you asking for stories where he's no longer Twilight's assistant/librarian? Where he's no longer Twilight's/the main six's friend? Where he's no longer going after Rarity? Where he's done with ponies/harmony/equestria?

They all can technically be called "quitting", but are VERY different, and might not even be what you're wanting

7874647
His job is twilight assistant/ slave and we all know that she wouldn't easily let him go and her friends would support her in that because they want her to be happy and don't really understand empathy.

7874629
Like quits being Twilight's assistant? Well, I've read a few of those if that's what you're looking for. I'm Your Son Too is my personal favorite. There's also Circus Days

7874650
Exactly.

7874652
You might want to check out a group called "Spike Tells Ponies Off". It's probably the best place to find what you're looking for.