The first ones shown are quite neat and pleasant. The "accidental" ones pretty quickly gave me motion sickness as I scrolled through them. They also weren't nearly as interesting, though I couldn't look at them for very long.
The unintentional ones deviate on both bases, creating a more chaotic result.
("Creating chaos" being an interesting notion itself....)
I've been taking pictures to be more effective wigglegrams now that I know I can auto-GIF them. I'll do a followup post at some point. The big trick is that they look better when the subject stays in the center of the frame, with the camera "orbiting" it to create a sort of parallax effect.