Once you find people in the census, there's so much information you can find out about them -- who all lived in the same household, and how they were all related, their street address, who the neighbors were, what they did for a living, whether they rented or owned their house, how old they were at the time, what level of education they attained -- all kinds of interesting things. And different questions were asked in different censuses, so it can be interesting to trace a person or family back through time.
For those who are just getting started in the study of their ancestors (or, genealogy), HeritageQuest Online provides links to online video and slide lessons from FamilySearch.org on special topics such as How to Start Researching your Family Tree, Census Tracking for Beginners, and Finding the Slave Generation.
Take a moment to connect with your personal history and find out more about your ancestors. You never know what (or who) you might find!