I studied Jungian depth psychology in undergrad (which led me off into comparative mythologies) and then saw an analyst for as long as I could tolerate it, which wasn't long. But yeah, what artemis says is a good way to put it--you have archetypes and some universal themes, but a lot is what holds meaning to the individual. Another element is a cultural norms, which vary.

But my favorite thing about dreams is the playfulness of the psyche. I had a boss who was mystified about a test taking dream she had. All she could remember was that she didn't know how to answer questions about a book. I asked what the book was about and she said she didn't know, but it had the name Jack on the cover. I started howling and told her that her psyche was telling her she didn't know Jack. haha. It fit a real life situation she was also struggling with. She needed to let this other thing go and this was a good message from her psyche to drop it. We had a good laugh and I loved being able to tell her she didn't know Jack ____.