Your studio images are promising. Looks like you have a decent understanding of lighting.
Try and shoot more controlled ideas - as in, visualize an image first then try and make it. Not just set up a certain lighting and start shooting hoping for some fun, exciting images to happen occasionally or accidentally.
Good advice. I sometimes have problems getting ideas from inside my head out in front of the camera, but I'm working on getting better at that.
Your post processing effects are over the top. Try sublte.
I recognize this as an issue, but I really like the clarity tool. I admit, I sometimes abuse it. A few of the images are intentionally over processed, like the model in the yellow dress and one of the B&W ones where the model wanted a "glamor shot" style image.
Since you ask, yes, get rid of those watermarks. Or make them simpler and smaller, even 50% opacity.
I'll probably get rid of them, but I'll wait to get more critiques to avoid confusion.