Your driver will meet you at 8am or later, depending on your preferences. The pickup location can be at your hotel or another spot around town, and from there you can visit any of the major attractions around Siem Reap.
Drive to the famous temples of Angkor to wander the ancient ruins, or cruise through the rice fields to experience life in one of the local villages. Stop at a restaurant to grab some traditional Cambodian food for lunch, or take a boat tour on Tonle Sap Lake to see the houses on stilts. You can also visit the Landmine Museum, or watch a traditional silk weaver, and your English-speaking driver can make recommendations of other places to visit.
The car can fit a maximum of 4 passengers—or 3 if you add a guide—who can accompany you through the temples and villages to offer some background and insight. You can also schedule an early pickup for sunrise at Angkor Wat, and conveniently visit other temples at the timing and pace that you choose.
When you've had enough action and sightseeing for the day, your driver will drop you off at the Siem Reap location of your choosing.