Alright, I'm not going to give huge in depth comments for all of the photos, but I can see some trends going on that I can address a couple of photos to each.
Firstly, Rip-1.png, bee.jpg and bee2.jpg all are great photos. Good depth of field, nice colours and the focus is nice (bee.jpg seems to be a tad out of focus on the actual bee, but probably just because it moved or something, hard to get a clean, accurate focus). However all these photos have centred focal points. Going by the basic rule of thirds rule which I know you know, these images have either been cropped funny, or you just took them like that. While there is nothing wrong with the photo itself, the placement of the focal points and the composition is the only thing letting it down in my opinion. They just feel a bit weak and don't stand out as much as they could.
The next bunch are flower.jpg and tap.jpg. Basically, I think these images are executed nicely, nice colours and beautiful depth of field and accurate focusing, however, I think the composition again is lacking. Both of them just feel sort of boring, mainly because of the framing / how you have actually arranged everything. Firstly, I'd argue that the flower is way too big in the frame and because you have a lot of it included, but the outermost parts outside the frame, it isn't balanced and seeing a macro of just a flower and not showcasing the depth of field too much is nothing special and a little plain...
tap.jpg is the same deal, I'd try and get more of the actual tap in the frame so it feels more rounded and balanced. Also, maybe try adding artificial light to brighten parts up and make it a little more exciting. It is a little flat, not in terms of depth, just in elements. It is like background blurred, then tap + water. Try add some foreground or more elements in the background in between the furthest point and the focal.
As for book.jpg, I love these kinds of photos, however because yours does not show a quote or line that can stand by itself and remain meaningful, it is quite boring. Yes, technically it is a lovely photo and well shot, but the content is boring and doesn't connect with the viewer. It is like you saw the book open, and just took a photo wherever it was open to. It could have been so much better if you looked for a line to keep in focus that could mean something to the viewer without reading any of the rest of the page / book. Right now it is just foreign and confusing.
Hopefully that wasn't too harsh! ;)