Here are some soft skills that you should have a Full Stack Developer:
1. Problem-solving skills: Full stack developers should have problem solving skills to solve coding or other errors and to move forward will help you work more efficiently.
2. Patience: It’s crucial to have patience, calmness and positive attitude in your role as full stack developer because coding takes time.
3. Creativity. Full stack developers must have creative skills to create a visually appealing with better user interface to all end-users.
4. Good attention to detail. As a developer, you need to have good attention to the code you're creating.
If you want to become a full stack developer, check out this Full stack Developer Course by Intellipaat.