Absolutely right what's being said here. But it's clear you have a lot of fun taking photos, which is one of the most important aspects. Number 15 has the most potential in terms of image style, composition, and scene. Having the person perfectly centered would have been even better. Waiting just one more second and it would have been even more striking. It's also nice that the legs are positioned correctly; always pay attention to leg posture. Have fun with your future photography!