Donkeys (and mules, which inherit the temperament of their donkey parent) are often stereotyped as stubborn, unworkable, or difficult. However those who work with them describe them rather as intensely loyal once you earn their trust, but unwilling to put themselves in danger unnecessarily. A donkey will outright refuse to attempt a crossing it believes isn't safe, where a horse may well attempt and come to harm. A donkey won't be rushed, and a donkey won't carry a load greater than it can bear. It will pause and evaluate before action.
As someone who's always struggled to navigate the line between being generous and being exploited, in an environment where work is equal to worthiness, the donkey is an aspirational animal. Carrying the load with dignity, cooperation over obedience, trusting in one's own judgements and strength of will, giving freely as a friend while firmly preserving oneself - all suitable for the beast that bore the Christ to Calvary.
Also they are very cute and smart animals. ^^