Upload & Sell: Off
Lighting: Flat. So flat it appears to be non-existent, i.e., uncontrolled and not well selected. In other words, you can certainly use natural and indirect light, but choose well.
Exposure: Seem to be a tad under-exposed. That combined with the flat lighting simply makes the images "muddy." Some of this can be corrected in post production.
Post production: There appears to be none. Adjust the curves. Brightness. Contrast. Color balance. Seriously. Whites are supposed to be white, not grey.
I don't think the posing is so bad. A little cliche, but despite what some would like to say, that's somewhat common here. It's OK, but some things work OK or are even classic. The details are important though. These poses are an OK start. The other "mistakes" make the uninspired poses just something else to complain about. Watch the model's foot and hand placement.
Details in the composition: Come on. The lack of attention to detail makes these images nearly snapshots. The black velvet is fine for a background, BUT, it doesn't cover everything. Come on. So amateur it says "snapshot." Just doesn't cut it.
One last comment... The model's expressions say "bored" to me. There are lots of emotions that can be conveyed. For starting out, I'd highly recommend trying to have the model look happy. It may be a little cliche, but it's a good place to start.
These have a lot of problems, but still are not what I would call horrible. I suspect both the model and photographer were hoping for more. Take care of some technical issues, pay attention to details, and do some post production and these could become a good start.
Personally, I'd at least recommend taking each one of these images and really work the post production and repost them. It might help some folks provide meaningful feedback.
Don't worry about your images being somewhat cliche or whatever at the start. There is a reason certainly types are images are so common. They are relatively easy to execute and a good starting point to learn and experiment from.