Umm, I'm sorry to be negative, but compositionally, these pictures don't speak to me. I think if you want to use a hand as a prop, it should be writing with the pen. Just cupping the pen in the palm doesn't tie it to the hand thematically. Also, the perspective seems too close. It appears as if you're holding the pen about 1 foot from the camera. The photo would look more natural if shot from 2 feet away.
Although selective focus is a useful tool for emphasizing the subject, too much blur in the same focal plane can look unnatural. In this case, I think you've overdone it. Remember that a good photoshop job shouldn't look like a photoshop job.
More importantly, that is simply and solely my opinion. If you (or more importantly, your customer) like(s) the look, then stick with it.
Most importantly, you're working to improve. Keep trying. Experiment with different poses and different lighting - and your photos will get better.
Regards,
Eric