Atlanta has a very diverse market with different types of opportunities for different types of investors.

Provo is the most diverse of the cities you've mentioned, it has million dollar homes and $80,000 dollar conds similar rentals like Orem.

Overall - there is incredible diversity of income but has affordable housing to make it a great starting market for any beginning investor.

Philly has a diverse spread of areas with different exit strategies for each pocket.

One big reason Charlotte is so popular right now is that from a lot of different angles, it is a sturdy, diverse economy that is rapidly growing.

The economy is diverse and healthy.

Employers and industries are diverse: logistics (FedEx, Amazon), healthcare (Baptist Memorial, St Jude), other industries (Technicolor, International Paper).

Houston might be an ugly, traffic congested city without an exciting past so it won't get a lot of hype, but it is the most diverse city , easy to work with regulations and is not going to stop growing in any direction. 

It is a vibrant city, diverse city and the people are so friendly.

You can have low cap rates anywhere, but what differentiates Los Angeles is the strong and well established economy, shortage of housing, diverse urban community, etc.