Best cities in US for investment/rental properties

[Jason Fleming]

This is my first post on BP...Really appreciate the site and the amount of great info it provides. 

I'm curious to get experienced investors' input on which cities in the US are the best for investment/rental properties and why. Neighborhood specific details would be great too. 

I realize this is a rather broad question but figured this would be a good place to get a wide range of quality input. 

My wife and I are currently invested in a flip operation in Tampa, FL that is winding down. So looking for our next venture....and doing some due diligence. 

Any insights are very much appreciated.

All the best, 
Jason