Gallery Walls

I'm loving gallery walls. Gallery walls are a great way to add interest to a room and to display important and interesting pieces, whether they be photos, prints or artwork. What is so special about a gallery wall is no two can be the same as and they will vary depending on the individual. The content within the frame will be different, the types of frames will be different as will be the grouping. Are you more parting to a more formal symmetrical grouping or something like the images below with frames of all different sizes, shapes and colours?