This is really fun.

As a designer/amateur artist, the most interesting part about this to me was seeing other people's drawings/most-basic-concepts-of-a-thing drawn out: which lines they draw, which ones they don't, how they express an idea in the most essential way, basically. (the 20s really helps)

It's a great window into how people think about things.

As a reference: I couldn't understand why it didn't recognize my keyboard (http://imgur.com/fXk6Gg9) but then it hit me hard when I saw other people's drawings (http://imgur.com/J7Lqodw).