If only the world were populated entirely with complaisant people! Complaisant means willing to do something to please others, and complaisant people or animals are wonderful to be around.

Don't confuse complaisant with its near-homonym complacent. Both derive from the Latin complacere "to please," but while complaisant means willing to do something to please another, complacent means smug and self-satisfied, something that you want to avoid when you're on the winning team.