Awesome! Constructive criticism then.
You've got a good eye for composition! Like I said, this is good and it makes me like them. Couple things you may want to look into, though, is blending and smoothing. I guess it all depends on what program you're using. Things like Photoshop 7 or CS2 are top notch. Paint Shop Pro, I think, is also popular. OR if you don't have that kind of money (or connections) you could always look into OpenCanvas, which is a LOT cheaper and has the same capability as the aforementioned.
Now, with these programs, you get neato tools that could help you blend the color and lighting of the pictures. The first one, for example: The background is fine, but the two foreground pictures (Al and Beth) seem skewed, and the overall picture is dark. You could lighten the whole thing up and smooth out the edges so they aren't as rough, and maybe even blend the pictures slightly with the background.
I could be making absolutely no sense. I do that, a lot. So, I could suggest you go to
www.deviantart.com and put in the search field "wallpaper tutorial" or something similar. You could put in just "tutorial" after almost anything and find a good bit of instruction on how to do whatever it is you want to learn to do. I learned some neat blending techniques this way, actually. Very useful.
If I can ever be of any assistance, please don't hesitate to contact me!
You did a good job! *hug*
Carol