long exp: didn't really feel it, i think you should try out a tripod
fruitbootin: could have used a flash .....if you have one of course
G status: get closer, you have to much extra in the frame, maybe get down on teh ground a few feet from him point you camera up for and interesting angle, cropping the pciture a lot to focus the interest on the action
dog shots: were great, although could use a little pop in post processing, did you just press b/w on your camera if so thats a big no-no
Your composition seems to be well on its way with the last few shots, so you are good there.
If you have any other questions feel free to PM and ill do my best to help you out.
-Pippin