Mechanical keyboards. Picked up a keychron for cheap. Decided it was too loud, decided to change the switches. Then the keycaps. Now I'm ordering barebones keyboards and artisan custom keycaps. This shit is an addiction.

Only if you're concerned with gaming on Linux. Nvidia drivers aren't open source so it's a bit of a finagle to have Linux utilize Nvidia GPUs to their fullest. Otherwise it shouldn't be a huge deal. I prefer AMD because the drivers are wrapped up into the kernel so I've never had issues. But intel does have quicksync capabilities which is pretty nice for plex stuff. Otherwise nah

Dual boot? I used to do this before moving my daily driver over. Haven't looked back since.