Hi Frank,
Quite often it is difficult to reply to your photos since you do such a thorough job on them, there isn't much to criticise to start with. Having said that, Dutch are capable of criticising anything so I'll give it a go. Mind you, I won't let my ignorance in studio matters get in the way either ;-).
Composition wise, I like #1 and #3 better. Wit regards to #2, her eyes seem to be glazing or milky. Almost all you can see are highlights in the eyes. Would it be an idea to have at least some reflected light on the left cheek and eye in #3?
Thanks for sharing these.
Cheers,