Before you start animating, ask yourself: what’s the purpose of this animation?

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Morphing of the feedback component below helps make the experience more unique and memorable. This works as long as the user will rarely interact with it. It’ll then become a pleasant surprise, rather than a daily annoyance.

Used multiple times a day, this component would quickly become irritating. The initial delight would fade and the animation would slow users down.

This is one things that drives me a little nuts about the Apple Watch. The animations feel incredibly sluggish and notifications are slow to dismiss. It usually happens when I'm about to start a workout and inevitably I end up putting the UI in a state that I don't want.