Okay, I have been living here for 10 years and have had children for 2.5 years. Here is why we are leaving (soon God Willing!):
*We live in a nieghborhood where the parks *SUCK*. Not only are they super dirty, but the *freakin* teenagers sit and smoke pot far too close to the kiddies. This doesn't happen in every hood, especially the upscale areas, but I am in what is now a very EXPENSIVE area and it still happens here. If you say something to the kids about the smoke it turns into a situation where they get really aggressive and then you feel threatened for your child.
*We live in a nieghborhood where drunkards, on weekends mostly, walk screaming down our street at night. The often leave presents of puke behind. We live on the 4th floor and you can still hear them plain as day.....
*In the summer the air is so polluted and it is so muggy you don't want to leave your house. I don't even have air conditioning, and I live right next to a highway and I still don't want to leave.
*In the winter it is so bitterly cold you don't want to leave your house
*The subways with kids SUCK! People don't give a crap and like my friend said "Um please don't push my son down the stairs while your rushing - he is only 3!!!" The sidewalks suck - people don't give a crap and will push right past you 9 months pregant pushing a toddler in a stroller or not. I don't even take the subways anymore. I got stuck on one during rush hour under the east river for a half hour and never recovered - it was terrifying. Right after that the subway bombings in Russia happened, followed by the train bombings in Madrid. I can't help but think about 1 of the 3 every time I get onto a train.
*Freshdirect the food delivery service is awesome, but if you are really into picking out your own foods you usually have to travel to Manhattan. If you live in Manhattan your apartment is probably too small to have kids and a significant other AND be comfy. Unless, of course, you are uber wealthy or won the jackpot of finding a rent regulated buildings. If you have to travel to get your grocercies, remember you have to carry them and your kid home (good excercise tho!), and prolly carry them up a walk up.
*Brooklyn has some of the highest car insurance rates in the country. So if you get a car be prepared to pay for it. Also tickets here now start at about $70 and parking is usually $200 or more a month
*You can't, generally, send your kids to public schools. Variances (a paper that lets you send your kid to another school or district) were suspended for a while, even if they have been reinstituted they are hard to come by. If you send your kids to private school, the tuiton is NOT tax deductible. If you live in the 'burbs you can write off your property taxes and send your kids to school, a double economic plus for me.
So there!
I know this sounds soooo pessimistic. It is honest. I could write just as many good things about the city too, but alas that is not what this thread requests!