Pretty nice photos. The 60D is a nice camera. You should have a lot of fun with it. Just a few pointers for you to consider on your next expedition. . .
1) I agree with CAPSLOK. I like the composition of this photo. It has a very nice feel to it. About the only real critique I have is the leaves in the foreground that are facing twoards the light source are slightly overexposed. You probably would have been better off with an exposure about 1/3 - 2/3 stops darker, or just break out the burn brush in Photoshop, but overall it's still a nice photo, so I wouldn't worry about it too much at this point.
2) Try to avoid putting the subject of your photo dead center in the frame. It's not an absolute rule, but it tends to make photos look static and flat. I think a better composition would have been to have the collection of leaves towards the bottom left of the frame. That way, you also have the branches serving as leading lines from the top right of the frame, leading your eye down through the frame.
3) I quite like the chaos of shapes and colors in this. The sky is blown out, but that can be very hard to avoid. For a picture like this, I find it best to take on a heavy overcast day or very early in the morning, usually about 15-30 minutes before sunrise.
4) Not a bad composition. The photo could benefit from a little more contrast, which is something you can add in post processing. Front lit shots (i.e. shooting towards the sun) can be tricky, but you did a pretty good job, though I might have used a slightly different angle to block the sun a little bit more with the trees. It has the added benefit of giving the leaves a really nice glowing effect.
5) Be careful of what's in your foreground. Foreground can be a very important element in your photo, but in this case, the random grass stalks distract from the rest of the photo. I'd also recommend getting down much lower. Look for that angle that someone just passing by wouldn't see.
6) Nothing really jumps out to me in this composition. The bridge in the background is kind of interesting, but it's lost behind the trees. I know your focus is on the stream, but think about how the different elements in the scene work together. Where is the stream going? How do you want the viewers eye to travel through the photograph. A bit advanced, I know, but something you'll want to start thinking about. From a technical standpoint, it looks like you also need some more depth of field (i.e. a smaller aperture/larger f-stop #). If you're planning on doing a lot of landscape, I'd recommend looking up 'hyperfocal distance'. In short, by calculating your hyperfocal distance, you can decide what aperture you need to get your entire scene in focus, which I think would have worked much better in this particular shot.