প্রশ্নগুলো সহজ, কিন্তু উত্তর তো জানা নেই

I went to take advising for specialization. The advisor asked me what I want to do after 10 years. I wanna do a tons of thing in next 10 years, unfortunately none of them related to doing anything productive. So I told him
- Could you tell me my options?
Then he went on and on about the great opportunities Business Computer Information System(BCIS) offers to human kind. None of them seems fascinating to me. Seeing that I still have no clue after 45 mins of advising. He asked me to take MBTI test.
I took this test couple of times for my job and classes but every time it gives different results. I was a INTJ, then I became ENFJ. The most recent one shows I'm a INFP.
He said thats very normal, because people learn, experience new things over time that led to change in personality. There is nothing wrong with the test. :(

Then We asked me to take Right Brain Vs Left Brain Test. According to this I'm a right brained person; meaning I use feeling rather logic, imaginative and risk taker. None of this are helpful being a BCIS major. Left brained people usually do good in this major. It requires logical thinking. Too bad I came to this realization when I have 3 semester left.

It makes me wonder then why do I have really good GPA? Am I a book smart? If so, how am I working in corporate America?

I'm totally lost. Are all those test bogus? Is the whole system wacq? Are both parts of my brain active? If so... does it make me a good for nothing or a wonder of nature???