First of all let us look at composition ; There are only 5 types of composition
1 Left to right
2 Right to left or known as Arabic
3 The v
4 The S
5 The L
All composition if it exsists will fall into these
When we say left to right it generally means from the bottom left to top rigjht hand corner .
All 3 of your draft covers fall into the left to right category which is good
If you let your eye look from left to right you will see that no 3 is the most pleasing to the eye . You could further improve no 3 by eliminating the right angle black and start with a curve at the corner .
It sometimes helps if you squint when looking at a composition .
I have studied composition with Frank Kristian who was the head judge of major art shows as well as being chief judge for the PPA .
I practice professional photography to pay for my koi hobby
www.eugenephotog.com