I like the first one, the water is nicely blurred I love water shots though.
The second one, I'm not sure about, it looks too busy and the narrow apeture means the image is all in focus, it works for some images but not here. I appreciate the problems with the limited lenses so I'm not too troubled but a wider apeture (if available) would have helped the messy background. I guess you couldn't have asked the guy with his arm in the right hand side of the shot to move so I guess you could just crop it in.
The third one is great, but a general rule of action shots is to have the subject traveling from left to right (which you've done) and to leave the subject room to "move into", which you haven't, but you could have had you taken it holding the camera horizontaly.
Overall, great shots but the composition of the last two ain't so good.