It's important to know what you're good at and what you're not...both of which are equally important. If one of your greatest strengths is working with people, you might want to find a major/career that allows you to utilize that strength. Conversely, it would be a good idea to avoid majors/careers that heavily involve things in which you struggle greatly.

Sometimes, your strengths and skills align with your interests. Other times, they don't. Sometimes, through hard work, you can turn a weakness into a strength. Other times, you can't. All in all, it's incredibly important to learn these things about yourself!