When I looked at my photos from the Grand Canyon, I was pretty disappointed with the results. Part of it was that I missed a planned sunset and sunrise, and part of it was that the photos I did take just didn't look that nice.
I processed the images as HDR (high dynamic range) images. At the time I thought they were okay, but looking back on them, they were oversaturated and not well done.
I find that when I review the things I've done before, I often thought they were good at the time, but now I look at them and cringe a bit. I just reworked this image today and I actually like it. In a few months if I look at it, I probably will wonder what I was thinking.