Hmm they are pretty nice.

They both need lighting though. Both the photos seem very dark. Light is your friend!
The shots are very nice, good concepts.

Maybe on the first one you shouldn't have cut off her shoulder either, I think it would of looked a little better with a full shoulder :P
For the second one same goes, but with the legs, feet, and hands. Im not a super photo person, so I might be wrong, but either cut off the whole body part or just leave it :P.