I feel that to the design him lack something, but I have not even been able to conclude that is. I hope help me. Any suggestion is accepted. Good day for all

Perhaps use only a few colors to put more attention on him. I'm more drawn to the background because it's more striking than him.

Thanks for its suggestions and commentaries. Now I present/display my new version to them, hoping this design is better. I wait for its commentaries. Thanks.

I'm sorry to tell you, but I liked the first one better.

It has become a bit busy now with the double color in the back.

Maybe instead of changing the whole design you could try to pull the eye towards leonidas himself by adding a dark color to him.

Have fun working on him.