Very good start with your gallery. I think some of these pics are really good, but some of them are not so good IMHO.
I think you should work on your overall composition and on the lighting. In the GT5 section, there is a great tutorial about the GT camera. Maybe you want to have a look at it
right here
These two have a great composition IMO, especially the second one.
The first one is also great, especially because of the good lighting, however I think it should be zoomed in from a higher distance.
This one for example has a very good composition, especially the angle is a classic one and the sense of motion is good, however a lower shutter speed could improve it even more.
I hope I helped you a little bit. I really want to see more shots from you so keep it up please