Hi. Good portfolio have different samples. Like brochures, web design… a bit broad different subjects. Keep your story short on every sample you show.
In my experience, if you’re good with story telling - some of your work are worth telling the process like how did you come up with the idea etc. But keep it brief
Do you go to a design company? I would show also process / concept of your work.
Other companies, well in my experience, do not care much for sketches but the end results. Unless they have other designers… it’s important to research this company so you’ll be more prepared with the questions.
1 example of a good portfolio:
(Why? Packaging design, logo, poster… etc different work + a story behind it)