Identify Niche Blog/Website Ideas

Generate 5-7 ideas for niche blogs or websites with good passive income potential through [Specify potential monetization methods, e.g., 'display ads (like AdSense/Ezoic)', 'affiliate marketing', 'selling own digital products']. Focus on topics that:
- Have a dedicated audience.
- Offer opportunities for valuable content creation.
- Are not overly saturated (or suggest a unique angle).
My interests include [Optional: List interests] but explore broadly.