On the negative side, when you run short of battery power you can't pop in some AAs from Wal-Mart and keep shooting. Most digital cameras will include a flash unit. Flash units usually have several operating modes. These will include always on, off, red eye reduction, and others. The more modes probably the better.
Some cameras offer special features.
These include video recording and audio recording. Video recording quality is generally not very good quality and should not be considered a reason to choose one camera over another. Audio recording is a handy feature that will allow you to add a voice note or other sound to an image. For example you could record the name of the people that were in the image you captured. Or maybe you wanted to capture the sound of the old steam engine you saw powering a sawmill.