what was the motivation for originally making it with irregular ticking?

It sounded fun (and it is)! My favorite mode is one that ticks each second imperceptibly fast, and then stalls for a second in one of the ticks (so that it lasts two).

It's just the right amount of "did that clock just skip a beat? Nah must just be my imagination".

Ha, cool! I love the whimsicality of this

Thanks, I love it too!