Brainstorm Profitable Affiliate Niches

Act as an Affiliate Marketing Strategist. Research and suggest 10 potentially profitable affiliate marketing niches based on the following criteria:
- Related to my interests/expertise in: [Your Interests/Expertise, e.g., 'home fitness', 'digital photography', 'vegan cooking']
- Market Trends: Consider current growth areas and online search volume.
- Audience Size Potential: Aim for [Desired Audience Size, e.g., 'significant but not overly saturated', 'highly specific and engaged']
- Competition Level: Preferably [Competition Level, e.g., 'low to medium']
- Monetization Preferences: Consider potential for [Monetization Preferences, e.g., 'recurring commissions', 'high-ticket items', 'digital products'].
For each suggested niche, provide a brief rationale explaining its potential.