First of, I think you should put the pictures directly in your post. Many people are too lazy to click on links and search through pictures.
Now, on to the CC: For someone who is new to photography, some of these look really good, especially the silhouette shots. Others look like your typical "I was really not rying"-skateboard-shots. When doing skateboard photography, you should try a lot of different angles, very low ones often work brilliantly. i wouldn't use a wide angle converter too, IMO it looks really cheap and gets boring extremely fast. A real fisheye should be relatively cheap for a Canon.