There are lots of differences of opinions as to which materials is best for photo framing. Some advocates prefer the simplicity and clean appeal of a sharp aluminium photo frame whilst a great deal of other people find wooden photo frames to have more character and warmth to them.
A good deal of these opinions boil down to personal preference, there's no definitive right or wrong answer as to which materials is best for photo frames.
You ought to take into account factors including (but not limited to) the décor within the room, the subject of the photograph being framed, the mount style and wall colour (along with many other diverse components). Ultimately though it’s up to you. What works fantastic for some people will not necessarily work for others.
Picket photo frames do tend to have a more rustic charm to them than their metal counterparts, picket frames commonly have a far better join in the mitred corners (as wooden is more flexible than metallic and may be held together when joined).
Wooden photo frames and metallic photo frames both often last a long time, they are each durable against scratches and scuffs and each will commonly contain glass in them to protect the photograph from the elements.
Be wary of wooden effect frames, these are often made from an inferior materials such as MDF or plastic and typically have a printed paper wrapping which can look like a natural wood. These frames are often extremely brittle and can scratch and dent simply making them a great deal less attractive than their wooden rivals.
When hanging your frames, whether they are metal or wooden photo frames, take care to prevent hanging them in direct sunlight, not only will you've trouble seeing them (unless you use non reflective glass) but the suns UV rays will harm your photograph causing it to fade or change colour.
For a lot more facts about any aspect of picture framing, pop along to your local high street framer or go to a reputable on the net picture framer.