I recently found a couple of socionics tests here that give you your type based on your choices between pairs of images. I haven't seen them posted anywhere, so I thought they'd be interesting to share.
To take them, you just have to register on the site (the 2nd link at the top of the light gray bar on the left). It's a really simple process. The site is in Russian, but google translate did wonders for me :D.
The first test (the very first one on the test page) is the art preference test, and the other one is the pattern test. Were your results accurate?