Mine is interest in retro gaming which oh boy, there's a lot:
- CRT vs Line-doubler device like OSSC and RetroTINK
- HDMI Mods/Adapters
- Native hardware vs Emulation
- Grading mint game and the price for it (I still see it as snake-oils)
- If [Insert old game] hasn't aged well or is that person simply not good at it.
Bonus points if that person happens to be Gen-Z and comments selection bitching about Gen-Z. I hate the weird elitism retro-gaming community have which as a Zoomer, it does put me off wanting to play older games if I be judge for being too stupid to not get it straight away.