Not all agents work the same way. The most important attribute of an agent is that he/she is well connected to the real estate industry. He/she should know the market and provide information on past sales, current listings, and his or her marketing plan. In addition, you also want to look for an agent that is honest, assertive, and one that best understands your needs.
Try to go with a local agent. They can better serve your needs; they are familiar with what the local market condition is, the local prices are, and what's hot or not in your community.