Congratulations on your first 6 - woo hoo - feels great huh?. This is a nice shot with attractive composition. I voted it a 7. It's incredible how many "constructive" comments you received on this - I believe some voters were perhaps a bit picky but it's great to receive substantive comments (whether you agree with the opinions expressed or not). Good job and congratulations.
BTW - where are the "Mice"? - hee hee! Couldn't resist! ; )
Weird effect. Is that a guardrail in the foreground? The way this is composed you almost get the feeling that there is a mini biker riding on it. It disturbes the balance of the composition.
Good lock on the biker though, nice pan.
Nice blur action here. The composition bothers me a little since the guard rail blocks where the tire meets the road, and is too high to give the illusion that he is riding on top of the rail.
I really like the sharpness in the biker. Not perfect, but very good. What pushed this to a 9 for me was the cropping - the long horizontal really emphasizes where he's going with all of that speed.
Good depiction of motion while keeping the subject in focus. The crop is ok but I feel it could have been better. I think in this case a much tighter crop would have worked better. I do like the idea with this crop however, the break in the trees which produced that white spot is a bit of a distraction. If that was all green the crop would work perfectly. Just my opinion though.