When it comes to message boards, I would join many but often I would post very little. I'm going to try and come out of the shadows more.
I have tested INTP a few times. Maybe it will change in the future. I don't know. What interests me more than my test results though, are the discussions people have concerning their own and others and how this affects how everyone interprets each other.
That's all for now. Hopefully I will have more to say in the future.