I just did an online Myers Briggs personality test. I don't know if it's publicly accessible - requires log-in I think - but if anyone's interested, it's here. I wouldn't place too much store by internet psychology tests anyway.
My results suggest I'm Introverted, iNtuitive, Thinking and Perceiving, though only the first of those seems a strong trend. This is, apparently, the classic portrait of a thinker:
They are the "absent-minded professors", who highly value intelligence and the ability to apply logic to theories to find solutions. They typically are so strongly driven to turn problems into logical explanations, that they live much of their lives within their own heads, and may not place as much importance or value on the external world... They may seem "dreamy" and distant to others, because they spend a lot of time inside their minds musing over theories... The INTP has no understanding or value for decisions made on the basis of personal subjectivity or feelings. They strive constantly to achieve logical conclusions to problems, and don't understand the importance or relevance of applying subjective emotional considerations to decisions. For this reason, INTPs are usually not in-tune with how people are feeling, and are not naturally well-equiped to meet the emotional needs of others... Since their Feeling side is their least developed trait, the INTP may have difficulty giving the warmth and support that is sometimes necessary in intimate relationships... If the INTP has not developed their Sensing side sufficiently, they may become unaware of their environment, and exhibit weakness in performing maintenance-type tasks, such as bill-paying and dressing appropriately.
Apparently suitable jobs include:
Scientists - especially Physics, Chemistry
Computer Programmers, Systems Analysts, Computer Animation and Computer Specialists
Lawyers / Attorneys
Forestry and Park Rangers
So some hope there then...