God doesn't make suggestions. God commands us because He knows that if He makes a suggestion, we won't follow the advice. After all, we know a lot more than God. What does He know anyway? What has He ever done compared to all of my experience? And I know myself way better than God could ever know me. It isn't as if He had anything to do with me being here. Unfortunately, our attitude has evolved to hear commands as suggestions. Commands are made to those who are unable to make correct decisions on their own.
Lord, help me to know the difference between suggestions made by those around me and commands made by You because You know what I need and You know I won't do it unless I am told to do so.