Not much love for the Aspie Quiz in this thread. And yet, most of the objections raised apply to ANY test taken in a non-clinical setting.
All of the tests have questions which some people see as "bad" or "vague." The test-taker's frame of mind will affect how they answer on any test. R-dos' theory about autism is . . . let's say, "original" . . . but that is immaterial. Most autistics, and a lot of professionals, strongly disagree with Simon Baron-Coen's theories about autism, but his AQ test is still considered a valid screening tool. Any of the tests could be a bad "fit" for a particular individual, leading to inaccurate results.
None of that matters.
What matters is, is it accurate? That question has been addressed, in great detail, numerous times on WP, and the answer seems to be yes. It appears that it is actually somewhat better than the AQ, which is an officially recognized, commonly used screening tool.
Note, however, that I am referring to these tests as "screening tools." While low scores can pretty well rule it out, a high score on any - or even many - of them is not sufficient to conclusively diagnose an ASD. Consistently scoring in the asperger's/autistic range would show that deeper digging might be in order, though. Don't depend on just one of these tests, either. There's a sticky in this forum with a link>Set of scientific tests related to Autism Spectrum Disorders<link which includes links to seven "official" screening tests, plus the Aspie Quiz. If you get consistent results showing you to be near, but below, the cutoff (which is how I interpret your results) on all of them . . . well . . . you're probably on the right planet to start with, but reading - and commenting - here could teach you a lot about how to relate better to your wife.
There are also a LOT of blogs by autistic adults which might help you learn to better communicate, and how to avoid some of the "lonely together" frustration.
Welcome to The Planet!