I'm struggling to think what topic you'd choose if you went on Mastermind... can't quite put my finger on it....
Railways or paleontology are my two favourite subjects - and I use both for my part time job as a tour guide in far western Qld.
Used to host rail tours of the Swiss Alps, a favourite place of mine - my wife describes Switzerland as the world's biggest train set.
Gave me a chance to visit the Large Hadron Collider at CERN a few times.
After Covid ceased travelling for a few years, I lost the appetite for long distance flying. The novelty wears off when you do it too often.
For a while I was the go-to guy for ABC and commercial stations if they wanted a "train expert" to talk about a subject. Took the late Peter Harvey through the disused tunnels under St. James for a channel 9 special. Ray Hadley even did a 20 minute interview with me about trains on the North Coast, where he hails from. I got him to admit on air that he doesn't mind the Bulldogs.
I once did an interview with Wendy Harmer about the CERN complex. Luckily it was a soft interview, otherwise it would have challenged my limited knowledge a bit.
Also have a passing interest in cosmology, and WWI aircraft.
Listening to music is my favourite pastime, but I'm not familiar with popular modern music, unless it is jazz, blues, or fusion, like Fat Freddy's Drop.
I stream most of my music these days through a class A amplifier, or play vinyl on a classic belt drive turntable with moving coil cartridge - which most audiophiles would consider Nirvana.