I have no idea how this stuff works. So, I might as well test my theories. (Oh, I'm revelling in this INTP thing...)
Earlier this year, when I first started getting into this typology stuff, I was a all around moderately expressed ENTP. The year before that, I was an INTP. The difference was during early this year I firstly began to participate in my school's debate team, which did wonders for my sense of humor, and secondly, I got a girlfriend (an INFJ who became an ENTJ, whose personality changed when mine did), which did wonders for my self esteem and my sense of adventure :p
Now, taking the test again a summer later, I'm an INTP. I had a little bit of disappointment, because I very much enjoyed having the heart of a Feynman instead of Einstein, but not accepting who you are gets nowhere and I realized that it's a lot of fun thinking without the meta of thinking if you're thinking too much. I wasn't very much an expressed extravert anyway. :p
So, with that in mind...
What if, pour example, one would be able to use antidepressants to change one's introvertedness or likewise extravertedness? If one developed a more outgoing or reserved personality by applying the right drugs. My naiive result, I figure, would that the modes of my personality would reconfigure themselves. Instead of having a primary introverted thinking and secondary extraverted intution, they would switch, which appears to do worlds of difference. That seems too easy, though... is that really how it works?
In the end a person is a person is a person and as insightful as this psychology seems to be at times, and we're all fascinatingly multifaceted and need to accept that types aren't the final say.
Maybe I just need to pick up video games again and go outside more :p It's just I sort of miss being the more laidback ENTP.