Oh boy, it's kind of intimidating to even suggest this to you guys but I stole this idea from an INFP thread and I couldn't resist trying it on INTJs.
The idea of this game is that you will change your MBTI type for one day and post in that forum all day in character as that type. The idea is to emulate that type, not be a caricature of it. Let's see how observant INTJs are! If you're interested in playing, say so on this thread and I will schedule a day for you and assign you one of the other 15 personality types.