When DS was a baby he used to wake up fairly happy, but as he got older, he increasingly woke up cranky - only after his daytime naps. After about the age of 1 - until at least 3yo he would wake up from his daytime naps cranky, crying, clingy and just really out of sorts, and would stay that way for a good 30min to an hour, sometimes longer. (He has since been diagnosed with ASD, so I wonder if it was some sort of sensory issue for him, as he really did not cope with it at times.)

DD is happy when she wakes. Can rarely remember her waking up crying and cranky, would be less than a handful of times.