There’s nothing more frustrating than writing stuff you’re not interested in. The words will lack passion, and it will come through to your readers.

Creative writing is about expressing your creation, and not someone else’s opinion, so write what you would love to read. If it doesn’t appeal to you, it probably won’t appeal to your target audience.
Exercise:
When writing, ask yourself these three questions;
1. Would I like to read a story like this?
2. Will I gladly share a book like this with my friends?
3. Is it a memorable story? Would I remember it (or parts of it) after time has passed?