Hi 308!
These are very nice! I like what you've done, but you're asking for critiques.
1. Very nice. It's too bad water isn't going over the water wheel, but you have no control over that. What I'd like to see is a bit more action with the water in the stream. Did you try different exposure times? I went to Smugmug for the photo. 95.8s is long. If you have shorter exposures or if you'll be returning, you might try different exposure times - 1s, 2.5s, 5s, 10s, 15s, and 30s. A little more action with the water could make it more visually interesting.
2. This is my favorite of the group! Here are some points, based on using Lightroom.
a. Straighten it. It's tilted significantly counterclockwise, around 2 2/3 degrees (Lightroom correction is +2.68°).
b. Crop it a bit. Come up from the lower left corner, not much, but a little.
c. Bring up saturation for yellow and green, 21 and 86, respectively. As I was doing a bit of work visually, aqua came up 1.
Do that and you'll have a stunning image.
Fwiw, I processed this on my computer. If you'd like to see how it looks, I can post it. Your profile doesn't indicate edits from others are permitted, so I won't post for now. And should I post it, know these are my edits from your jpeg, not from a raw photo. They're also what looks good to me, which isn't necessarily what looks good to you.
3. Technically this is a good photo. As with the prior photo, it is crooked, but probably off by less than half a degree. No matter, it's noticeable and should be corrected. What's more important to me on this is that it is a plain piece of rope. There may be rope that is interesting and perhaps even fascinating, but this isn't it. Would you print this, frame it, and put it on your wall? You did all of the right things. You isolated the subject, the rope, with a very shallow DoF. You also gave it a context as it is by a river or a lake, suggesting a nautical use. But it doesn't work in its current form. Hmmm... if you were to brighten the rope itself, whether through Lightroom or Photoshop (or equivalent), that could make the photo better, but for me it probably wouldn't have made it through the initial pass. It's a cool shot, but your second photo is superior in comparison.
In closing, I hope this helps! As you know from your post, it's really up to you. I prefer to always defer to the artist as to what they've created. I know what I like and what I'd do, but this is YOUR photography, not mine.
Hope this helps!