How do you choose a city to invest in?

[Marcus Coleman]

How do you choose which cities to invest in? I'm especially interested in rehabbing and house flipping, but I'd also like information on if I wanted to rent out properties.

Do you look at things like demographics? House prices? Population growth? Median income? And if so, which are the most important statistics to look at?

I've heard that you should invest in nice neighborhoods. But what about a nice neighborhood in an area with a low population? Or an area far(1hr+) from a major city? Does it matter?