I posted a thread a while back on this exact topic:
https://www.b4x.com/android/forum/t...uide-to-proper-use-of-animation-in-ux”.97585/
That said, me personally have
very little patience for animations. This does not include the example that Erel posted above - that's a very good example where it would look completely wrong
without an animation.
To give an example from the thread I linked to, here's what they consider good and bad. I have no problem seeing that this is true for most users, but for me personally I would want the list to instantly be there.
Which means I have, sort of, a motto like this:
Do
not waste my time. And
do feel super snappy.
In many ways this is like typography: If the user comments the typeface used (regardless praise or critique), it was a bad choice. The typeface is supposed to be a transparent bearer of information, not something grabbing the users attention.
Most likely this changes quite a bit depending on your target app audience. My mom would surely prefer a slower animation, so she could see what just happened. Me, and my app audience have a constantly high stress level and just want to get things done - hence no animations at all.