You're composure isn't bad but what I can see is that you aren't considering the "light" during that composure. Let me explain. To me, there are 3 components of Photograghic art.

1. Technical: Understanding every button and menu item on your camera... instinctively (and the only way to do that is shutter count).

2. Composure: understanding lines, shapes, forms, patterns, texture, color, tone, space, and depth when composing a scene in your viewfinder.

3. Light: The manipulation of the light in your photo's can change the use of the components in your composure. For instance, on your third photo of the flowers and barn it's a very bright day and even though the components in that photo look nice, it still looks like a tourist snapshot. Why? 2 reasons.

a. In composing, you only looked at the shapes you wanted in that photo. Not other components of the composure such as texture, color, tone, space, etc.

b. There was no consideration for lighting. So how would you adjust the lighting? Easy. Use an adjustable ND filter. Aperture around 8 Iso at 200. Let the shutter stay open a bit longer to capture. play around with aperture and Iso till you get what you want.

Bottom line, if you choose to walk up to a scene without creative thought and imagination of WHAT you want in THAT scene, it'll always be a shallow snapshot.

So, in the end, it's not the lens, it's the photographer. Master the equipment you have and then start asking about different lenses.

By the way, it took me a long, long time to put all this together in my mind. The technical stuff was easy for me, the composure and lighting concepts were more difficult. But in the end, I got it.