trying to think of a theme

For part of my topic, I need to write a group of poetry based off of a theme. I still have no idea what that theme could be! I could do love and heart break but that is way to common. I suppose I could do nature, or hardships in life. I could do both. I could have one section about nature and another about hardships.

Anyway, the main reason for this post is to explain that I am not exactly certain of what I am going to do right now.