Global gitignore should in general only be used for things that's "unique" in your local environment, like:

* IDE/Editor (for example, add `.vscode` to your global gitignore if you use VSCode, add `.idea` if you use IntelliJ family, NOT add `.editorconfig` because that's intended to be cross environment)

* OS level spam (`.DS_Store`, etc.)

* Any file generated by a tool you use locally

Also a pro tip, I have this alias in my global git config:

    why-ignore = check-ignore -v --no-index

So I can use `git why-ignore path/to/file` to show why a file is ignored (e.g. it shows which line in which gitignore file excluded it).