The one this forum uses. It seems like some people use it seriously, some use it ironically, some do both, and some completely ignore it. I'd be interested to see what people think from a socionics perspective. Personally I think it's silly, I'll just leave a comment saying what I think, but I do like marking posts that I view as both funny and completely unrelated to socionics as constructive. It makes the joke even better to me.