Question

if an interest inventory reveals that you are highly interested in solitary, introverted work, what might be the best type of career for you?

Answer 1

In my opinion, venturing into world of Arts could be a favorable path for a person highly interested in solitary, introverted work. Visual arts such as painting and photography (nature, macro-shoots, etc) could be better choices. Literature might interest you too. The art of words would allow you to express yourself without talking to animate objects. One could pick a pen or stare at his or her computer when indulging oneself in the ARTS. 

You do not have to impress others, your masterpiece could do the talking for you.

Hope this helps. Have a nice day!