1. Amateur Naval Historian
2. Supernatural Investigations no not a "ghost buster lol. Just like to look into where these stories start and how people get carried away. Use equipment like thermal cameras as proof of ghosts. Just had the switchboards in one of the buildings I look after done and you can catch your own thermal shadow easy
3. Exploring the old routes of roads and ghost towns there are a few quite close to Sydney.
4. Computers
5. Photography amateur and I collect old cameras nothing fancy or very costly.