You have an interesting style....
In my black and whites, I like to have definitive blacks and whites, so TRUE blacks and TRUE whites, both in the same photo, (not that I can even do it every time!) this is why the first picture doesn't do anything for me. I also don't know what the subject is.
In the second photo, there are definitely true blacks! I would have liked a longer DOF, but I love how the first part of the vine/stem is out of focus. I would also experiment with the vine not being dead center...
The texture is beautiful in the last photo! Unfortunately, you've chosen to only have a small fraction of the photo in focus. My eyes itch to see more of the railing/whatever-it-is.
There's lots of potential here, though!