Re chucking about etc, I was talking about babies, obv...as far as general upbringing is concerned I have had the same expectations of all of them (except the youngest, possibly - he is 12 and has only just started putting his own clothes away).
They have all had to do the same amount of helping around the house (fairly limited, mostly because I don't do a lot myself - emptying dishwasher, putting their clothes away, keeping their rooms tidy hahahahaha) and have all had to get Saturday jobs as soon as they are old enough, and then contribute to the cost of their own clothes, CDs, hobbies etc. They are also all generally responsible for getting themselves to and from places, don't expect taxi service from us and are surprised and pleased on the odd occasion they do get it (particularly from me, DH is much softer).
DS1 (16) has been out on the razz with his sister (23) in Leeds all evening and has "missed" at least 2 buses home. He works at Sainsburys all day Saturday and just rang up to ask if he can pull a sickie tomorrow; I said no, which he was OK with, but DH has just insisted on setting off in the car to pick him up from DD1's house, or else he probably wouldn't get home (apart from anything else he has gone back to her house without a key and all his stuff is inside, durrr.)
And we think babies and toddlers are hard work...