So I took the personality test that NK did, but came up with a much less beautiful color bar:
I'm a big Myers-Briggs fan, having taken the full test twice in workplace situations and learned a lot from it. This test doesn't exactly tell me anything new about myself -- but because it tracks a few more variables as you work your way through the questions, the results (especially the comparative ones*) are interesting. Plus, the question formats are great -- slider bars and grids you can use rather than simple multiple choice. An interesting interface, in general.
*The comparative results, apparently based on a sample of 30,000 test takers, told me, among other things, that 70% of test takers were less masculine than me; 98% felt they had less agency than I do; and only 2 % are less spontaneous than me.