You also need to ask yourself how you plan to print your pictures.
Do you typically make 4 x 6-inch prints at home or at the drugstore? If so, you would not need a camera with huge amounts of megapixels. On the other hand, if you sometimes make poster-sized prints, then look for a minimum of 10 megapixels.
If you don't even print your pictures but share them online and via email, you need even less.