All too often photos are placed into photo frames or simple readymades when they could look so much more special in custom frame designs. There should always be an air space between the glass and the photo...something that is often neglected unless it is custom framed.
When choosing mats and frames for your photos, think about the subject, era, color, style, and substrate. When you pay attention to each of these categories, your frame design will be the most flattering to the photo.
Unless you own the digital file or negative to create a new photo, you should always treat photos like any other work of art by using conservation grade framing materials.