My DD runs me ragged, too. Sometimes I really despise the fact my DB had a baby 3 weeks after DD was born, because you can't help but compare them. Of course their baby is laid back, easy to manage, eats anything you put in front of her, etc. Then there's my DD who constantly needs mental stimulation, is high maintenance about nap times, is a picky eater, etc.
It makes me look like this horrible parent who can't manage my own child.
OTOH, I think those "easy" kids with super laid-back personalities can be a bit boring. Easy, yes, but not a whole lot of fun. For instance, my DD says the funniest things and has a great sense of humor while her same-age cousin just looks at you with this blank faraway stare, babbles something incoherently and continues playing with her princesses.
