@soatok Nomaxice here, bit of a jack of all trade so it's hard to pick just one but let's go for "retro".
I've always been fascinated with anything mechanic and electronic to find out at the core how things work, as things grew complex in modern days, I found a love for the older, simpler, yet elegant solutions of so many things of the past, from typewriters, to adding machines, from early computers, to old cars.
I've gone and built quite a collection, a hoard really of various contraptions, my office space has half a dozen typewriters, two adding machines, computers from the 80s up to the 2000s, and one of my favorite things to do is to not just make those things work as they were intended to, but also mix and match different eras of things to function together.
My modern computer? The audio goes to a 70s analog amp, the printer is an 80s dot matrix, and I got a 2X speed floppy drive to swap files with my 90s DOS PC where I like to do story drafts.
My 8Gbps internet box? Its VoIP is hooked to a few rotary dial phones from the 80s.
My main cameras? A 35mm from the 80s, and until recently a polaroid from that era (RIP gear train), along with my camera phone.
Switching between my smart watch and a 40s pocket watch, and so on.
Finding ways to keep the old stuff living in a useful way is amazing, and shows that there's a lot of "obsolete" stuff that actually works damn well as is and we don't always need the latest gadget to do 4*9.