I organize all my photos on my computer with a folder for each month, and over the last few months there have been fewer and fewer pictures of Seth. He used to be very easy to photograph, but now, not only is he moving fast all the time, but he has gotten very used to my camera and doesn't want to have his picture taken. He actually tells me "no!" and runs away! So the nature of the photos I take of him has changed, but are fitting for his age and personality- they are the "doing" images rather than the "posing" ones.
I love them.
Above images shot with a combination of the Asahi Pentax Spotmatic and Kodak Portra 160nc film, and the Nikon D700.