if you're confused in life, or frustrated in your career, it's probably because you don't exactly know what you really want, or what really motivate you in life. there's no shame in admitting it, really. i've known really mature (means old, in a good way) people who still doesn't know what the hell they're doing with their lives.
and it's nobody's fault. we are driven so much by other people's (namely, parents, peers, etc) ideals that sometimes we think what we're doing is what we want, but sadly, that might not be the case. now, the key is to understand yourself. once you understand what really motivate you, what really excite you, you'll realize why you hate your job (if you do :P), why everything that seems to be wrong is wrong etc etc.
be truthful. take the test, and along with it, a step closer to knowing yourself. and of course, after taking it, post in the comments what personality type you are ;)
