We've owned since we got married 10 years ago (first a condo, now a house). Why do some people see renting as throwing your money away? Because when you own, a portion of your mortgage is principal (ie paying yourself) and interest (which is tax deductable). You also have your real estate taxes deductible. So, the principal part can be seen as a forced savings, (increasing your equity in the place) and the interest component can be reduced by a lot (depending on your tax bracket) by becoming a deduction on your taxes. So, the "real" payment is less than what you'd pay to rent, and you own. You also get to see the appreciation of owning an asset, which you do not see in a rental. An example, using completely made up numbers:
$2000 mortgage payment
$500 Principal
$1500 interest
Out of the $1500, you receive a reduction of your tax liablility of approx $500 (assuming 33% tax bracket). So, in reality you're only paying $1000 out of pocket (as you get the tax break and the $500 principal is a relocation of assets) for that house each month. I'm not calculating real estate taxes, as that can very GREATLY depending on where you live and house value.
Now, renting can make sense when you're in a short term situation and the housing market is slow, or don't intend on settling where you are. If you have credit problems, or no down payment the options are small, but they do exist to get you home ownership. If your credit score is more than 650, you can usually qualify for the 0% deals, though the loan amount is usually limited to FNMA standards (which I believe is in low $300k now).
Personally, I'd never rent again, and we decided to buy because it made financial sense to own instead of renting, even in NYC.