We all know intuitively that people have different personalities. Some people are extremely social, while others like spending long periods of time alone. Some people seem like counselors, so good are they at listening to their friends' travails, while others talk incessantly about themselves with no curiosity as to how someone else might be feeling.
One of the ways you can find the kind of work you are meant for is by figuring out what your personality type is through an objective measure. I did this recently using an internet test based on the Myers-Briggs typing system, and while it was a free online test and not guaranteed to be accurate, I have to say I was fairly impressed with how closely it matched my own strengths and weaknesses.
For example, I am an introvert, which means I draw energy from being alone, whereas an extrovert draws energy from being around people. No wonder, then, why being a writer appeals to me, and why the mere thought of being a salesperson tires me out.
If you're totally unsure of what you need to be doing, taking a test like this can help you at least figure out what you definitely are NOT cut out for, or what you should give serious consideration before diving in.
You say you already know your personality? Possibly, but do you know what your weaknesses are? I already knew I preferred being alone to large social gatherings, but I had never really noticed my predilection for perceiving criticism where none was intended. This is all helpful stuff to be aware of.
After you get your type, visit this page for a more detailed explanation of each type, and see what you learn about your nature. Now, there are criticisms of the typing, and people are too nuanced to be easily categorized, but even if this helps you see general trends in your personality, trends that make certain careers or occupations suddenly seem more or less appealing, then I think it's worth giving it a try.
I'm an INFP. What're you? Tell us in the comments.