Importance of SAT Subject Tests?

<p>I applied to the schools I care most about without having to take any SAT subject tests, and Stanford doesn't <em>require</em> them, but I was wondering how important they are for an application. My normal SAT's are decent (800 CR, 740 W, 610 M, not taking math in college).</p>

<p>Other information
My essay is excellent and explains my rather harsh life story
I'm a full IB Diploma student, and my GPA sucks (3.43)
My grades have been tanking because my family is getting torn to pieces over a divorce, which I also explain in the application (not related to my harsh circumstances growing up) </p>

<p>My Stanford application is just a shoot-for-the-stars for the sake of trying kind of thing. I might not go even if I /am/ accepted, on account of how expensive it is (and because I might get into the UW honors program, which is on par with Stanford and much cheaper).</p>

<p>But anyways, does anyone know how much does not submitting the subject tests will hurt me?</p>

<p>oh yeah, my first SAT test results were 650-620-620, which is terrible, but it demonstrates lots of improvement</p>