This is something I'm really trying to work on too, which is why it stuck out at me, but try not to let your composition cut body parts off of your subject. The first three shots all lost the top of his poor little head, and the second shot cut off his hand.
It's really easy, for me at least, to look
through the viewfinder instead of
in to the viewfinder, so you end up paying a lot of attention to the subject's face while you wait for the expression you want, or checking to make sure your focus is just right, or whatever, and you completely miss the larger picture. Sometimes that means you don't realize how busy and distracting the background is, and sometimes that means you don't realize you've got all but two fingers in frame when you could pull back just a touch and get the whole hand. Like I said, it's something I'm really trying to work on too.
They're good shots though, and I love the shot of the feet - I have a similar shot of my girl when she was a baby.