I hate to be a drag, but tests like this don't "prove" right or left brain abilities, and they certainly don't predict personality traits. Tests of your visual cortex just aren't capable of making those determinations.
In reality, except in extremely rare cases, we all use both hemispheres of our brains, and while L/R handedness does have something to do with the different hemispheres (as does linguistic acquistion and memory to some extent), it takes a battery of tests to determine whether you are L/R dominant. This particular test isn't a validated test so it wouldn't even be a part of a larger project used to isolate cortex abilities.
I know we all like to have fun with perception, but I just had to say this, b/c I get annoyed with pop psychology/science that spreads around and gets people to believe things that aren't the case. It makes it a lot harder for valid science to prevail.
But, perception is fun.
