Film poster design ideas

In regards to the poster for my film, I have chosen to use one of two possible photos. Both taken on my i-Phone (one during filming and one from a vacation the main character and I took), the photos would be my best choices as one is a natural shot whilst filming and the other one has a bright colourful background which represents the characters personality quite well. They both catch the main character in a natural state, no over-zealous posing or artificial lighting used (or required) and this shows good continuation onto my film as the majority was shot using natural lighting.
Here are some examples of what I've been working on: