I used to as a kid. I have three older siblings but there is such an age gap, that I feel like an only child. My fixation on having a baby sister went so far as to have my mom almost adopt a baby from China. In the long run it's a good thing that plans fell through.
Omg NO. I got a new baby brother three months ago, and don't get me wrong, but baby's are the most time consuming, energy draining and needy things there are. As a kid I wanted one because I thought it would just be something cute I could look at and someone I could play with, but god damn it I haven't got any sleep in...three months. =_= I definitely wouldn't want another one.
:) I have a younger sister (15) and brother (8) (and 4 older siblings). I have 9 nieces and nephews aged 2 months-6 years old. We get to see them a lot, so i'm just fine without having another newborn, especially since my parents are grandparents. Sorry if that was confusing. The bottom line is: I have many baby/toddler nieces and nephews.