How do I develop an eye for interesting subjects?

I've been at this for years and I have taken less than 20 photos I actually like looking at.

I stopped for a few years. Had to sell my camera due to rough times. Recently got used Canon 500d to fix up and start taking photos with again. But looking at the few thousand pictures I took with my old Nikon I feel uneasy. I have lots of excitement, but when I take the camera out on walks, eager to take some photos, I just don't see anything.

I watch videos on how to get better, composition, etc. It's like nothing is clicking.

Granted I live in a boring town, but what I see other's squeeze out of limited interesting subjects leaves me awe struck.

I'll post few of my "good" photos.