OK, so I've finally gotten around to adding some non IM categories, to start off with they include those listed below, but if I've missed any big/obvious one's just let me know and I'll get them added asap!
1. Dating, Romance, Relationships
2. Money, Finance, Investing, Loans, Mortgages etc.
3. Health, Self-improvement, Personal Development
4. DIY, Home Improvement etc.
5. Sports, Crafts & Hobbies
6. Job, Careers and Education
7. Miscellaneous - i.e. anything not covered in the other niche/marker forums.