Ogres are generally large, muscular, and usually brutish humanoid creatures of low intelligence and high strength. The category of "ogre", though, regards a large variety of creatures, some with more arms, some with more heads, and some gifted with strange, powerful magic.
On a whole, most ogres are simple creatures. They tend to subsist off the environment they are placed in, and if left to their own devices, they will simply attempt to survive as a predatory race. However, simple ogres are easy to manipulate, and will often follow the promise of food or riches, leading them to side with creatures like goblins that take advantage of their base nature. More intelligent or stubborn ogres will try to adopt positions of power to lead other ogres, and the most dangerous of these types is the ogre mage, which may empower his clan with wild and chaotic magic.
Ogres will eat most anything if they are hungry enough, but generally they prefer fresh meat, sometimes raw, but especially cooked. Many ogres are known to prize a good meal, and it's not terrible uncommon for a chef to be captured by a group of ogres to flavor their kills. Ogres have been known to try their own hand at cooking, but the results are generally disappointing.