Huh..interesting thread. And I agree with the OP with the skepticism, and mis-typing in general, and also comments on people testing as they *want* or believe they are, and not who they actually are (I sometimes wonder if I'm in fact guilty of that)...
I've decided all of the 'tests' are completely worthless to me at this point, because I've read too much on MBTI stuff!! Also, depending on the test I take, as well as the point of life I've been in, I have tested differently. To the point where I wonder if I shouldn't just type myself as INxx and be done with it.
So the tests themselves, which are how I would think most people end up typing themselves, are the problem. I think, especially with the J/P questions, it's kinda silly. At least for me, the J/P stuff isn't as black and white as the tests make them out to be. Or, the tests don't really get to the interplay between J/P and the other functions. Also, the T/F questions are kind of lame in my opinion. 'Do you consider yourself more compassionate, or more objective?' The reader of that question then might go through subconscious little filters, where 'compassion' is viewed as good, and 'objective' as bad, or vice versa, or they might not be one way or the other 100% of the time....or maybe I'm just speaking for myself, hahaha.
But my newest theory has been to look back at how I was as a kid, and just what my values in life are, and how I'm actually living my life, and how I ultimately act/react towards others, outwardly and inwardly. I have to forget the tests themselves, because I end up just confusing myself in my quest to get to ME. ;-)