Give me your opinion on my photos?

I'm an amateur not a pro with a Nikon D40 with a standard lens as well as a 55-200mm lens.

I really like those, especially your up close ones.
I have the same camera but I can't get good focus like you do, haha. It takes me a while. Keep it up.

Really pretty. Keep it up.

Wow. I'm amazed. They're really cool:}
Keep it up.

Not bad, you show good promise! But I can see some things that will give you some improvement.

I really like the shot "The Drummer".It shows you thought about the shot and effectively used the shutter speed to show the movement of the arms / hands. Nice work!

But there are other shots that do not show you are in control of the camera and lack some understanding of exposure. It appears you are letting the camera make the exposure decisions for you, and that is often NOT going to be correct. As an example, the shot "Snow Covered Boat" is very underexposed. This is totally normal and the CAMERA exposed for what it THINKS is correct. A camera always tries to expose to what is called 18% grey. Whenever you have an abundance of bright white in a scene, (such as snow), the camera will ALWAYS underexpose and give the ugly, dull look that is typical of any camera in full automatic. YOU have to realize that you have to ADD exposure value in that kind of scene. You should know to do it WITHOUT ever looking at the photo on your monitor. You know before you ever push the shutter release to either add +1.5 to +2 EV or to open up your aperture a couple of stops. This would give you bright, white snow as it should be.

There's the same issue with some of your flower shots, especially with white flowers. The camera underexposed and they are dull looking. You need to know to add exposure compensation.

Another point to keep in mind is your horizons. Just being level is not all. You are splitting the photo exactly in half with the horizon line. That is never a pleasing compositional look. Place the horizon line either in the upper one third of the scene, or in the lower one third, depending on if you want the ground or the sky to have dominance in the scene.

So basically, just work on getting the camera more out of the auto modes and learn to take more control of what the camera is doing.

Keep at it! None of us can ever stop learning to improve!

Wow that's nice!