For your first try these are really nice. :)

In your third and fourth icon, I did notice something. You should pay attention to the aspect ration, otherwise people will look stretched and all. If you go to Image > Image Size, make sure there's a lock between width and height (on the right-hand side). If you change the size of your image (the picture of someone etc.) with Edit > Free Transform, hold down the shift key to maintain the Aspect Ratio.