Stop motion animation is cool partly because it's insanely hard to make. You shoot one still frame, move the characters slightly, then shoot another -- then repeat thousands of times to make a little animation. While each individual frame may not be so tough, the overall effort is massive, and it shows. There's something about stop motion that just makes you say, "Wow -- that's real!"
In this PBS Off Book video, stop motion animators explain the process of making stop motion animation, as well as why it matters.
And now that you've enjoyed that, here's Peter Gabriel's famous "Sledgehammer" music video in 1080p (!):
If that's still not enough, check out this insane painted stop motion animation.