An Instrument Rating can be added to your license so you can fly in the clouds and lower visibility days/nights.
Where the Private Pilot License just enables you to fly with Visual Flight Rules (you can only fly if you can see the horizon as a reference), adding an Instrument Rating allows you to fly with Instrument Flight Rules. Basically it removes the weather limitation from flying and increases the flexibility of the airplane as a source of transportation. The aircraft instruments are used to navigate to the destination.
Be Well Paid
Commercial and private pilots are in great demand. Starting salaries begin in the range of $50,000 & up. The pool of qualified pilots has and is shrinking. This means that being a pilot has become a much better paying career.