The problem here is that since the MBTI only collects your own perceptions, it is only as accurate as your own perceptions--it isn't going to tell you anything you don't already think. There's some value in bringing what you think of yourself into your conscious awareness, but I don't think that can be represented as increasing self-awareness--it only can cause you to think what you already think. There's even some risk that it may reinforce incorrect ideas you may have about yourself.

> As a Meyers Briggs ENTP I find the descriptions of an ENTP personality flattering and desirable.

Of course, they're your descriptions and therefore they're biased. (Incidentally, I'm an ENTP too).