When i hand out treats some of the ducks almost jump into my lap while others just wait for me to throw something into their direction. During the morning meal-worm frenzy i can sneak in some pets with some ducks, but in general ducks don't like to be touched at all.
But that doesn't mean the ducks don't enjoy being around their "humons": My ducks great me with a friendly »Quack« when i leave the house, they come looking what i do when i'm working around the house, investigate the tools i'm using (which is sometimes bad, chainsaw for example) and enjoy when i talk to them.