Good collage, Joe. My guess is that you wanted it to look like a board where several pictures had been put. My sister has one in real life, and it's a great idea to try and re-create that digitally.
What I could sugest as an improvement is to have less regularity. Vary the sizes, vary the overlaps, make it a bit more chaotic-looking. Make it more obvious that they are NOT supposed to be perfectly symmetrical and aligned.
Angelo..just wanted to say your idea is fine, but not necessarily where tightly cropped images are used to maximize the space...(faces would be cut off etc) thanks again