Like most people, I entered COVID as a normal hobby geek with a Linux server I played around with and a healthy hardware habit with a side of home automation and DD-WRT. I emerged from COVID enrolled in college, now with two servers (one new build, one rebuilt from my first one), two Pi, multiple instances of Home Assistant (one dedicated) and putting sensors on everything a sensor could go on and rewiring switches for wifi control of overhead fans, flashing every compatible router I could find on Amazon Warehouse with DDWRT in my home for an ad hoc mesh network (no, it didn't work, but I didn't care) while cabling everything to switches and creating a really hilarious network deathtrap tripping hazard, a massive media library (discovered Handbrake and making multiple resolutions) and a Sonos home theatre system. And yes, played an unhealthy amount of Animal Crossing and got an NVIDIA Shield Pro for streaming and Plex, as you do. I'm sure everyone can relate.
SBC's were the natural escalation; I had credit card bills to pay off and that's going to take a while.
I gatewayed with Pi like ten years ago but it took off during Later COVID when I noticed my credit score and started testing it as a NAS, Media Server (later: Cassiope Media Server, my second end to end Linux build), then got into learning about the kernel itself. I already had an Odroid (Home Assistant Blue) so why not go on, so project-based SBCs seemed healthy; I had a reason for buying one. This led to more Pi's--as I couldn't use Kernel Pi (Eurydice) for it and Andromeda Pi was masking my personal network, then I needed one for a Pihole (Iphigenia, Hecuba), which is how I ended up with a BeagleBone Black (Medusa) for an Open Thread Border Router. Still pretending I wasn't just collecting them like cats, I networked them together and just enjoyed looking at them and making them matching banners with figlet with the excuse I was learning how to do network-wide deployments over SSH (true) and learn Debian OS (technically, I am doing that) and started PoEing things (my credit card bills may not be getting lower, no).
The count stands at a total of 9: one (1) Pi Zero W, one (1) Pi Zero 2 W, one (1) Raspberry Pi 4B 4G, two (2) Raspberry PI 4B 8G, one (1) Odroid N2+, one (1) Beaglebone Black, one (1) PocketBeagle, and one (1) BeaglePlay. (Other: two Linux machines, Watson and Cassiope). Yes, they all have names and technically, each is associated with a project. The BeaglePlay's (Circe) associated project is 'create my own documentation on what it does because Beagles don't document'.
So which ones do you use, why, origin story, feelings: go.
(I'm moving in a week and half my hardware is being packed. I'm about to have to take down my network and Home Assistant and may be freaking out. I'm not sure I know where any light switches are here, either.)
I think, you have a problem.
But a good one if you can afford it
There are way less productive and interesting hobbies and interests.
My honest opinion: literally any hobby or interest that makes you happy and makes your life better is productive and valid and should be encouraged, but i do have an acquaintance who once in a while forgets I am a nerd with a nerd son and a nerd's ability to google productively and extensively. I do not need to play to know how much it costs for serious gameplay when you're into Magic the Gathering so you really want to talk about my forays onto Newark, Mouser, and Adafruit? He does not.
(Honestly, I'd bankrupt myself if i was into Magic the Gathering; I am not a gamer and stick with stuff like Animal Crossing and Stardew Valley and Final Fantasy because I only have two modes; casual and competitive murder if it hits me right. Even thinking about getting into DnD makes me a little nervous; in theory it seems like I'd be okay but that transformation into Seperis-Hyde is really distressing.)
Fun note: I was in Magic: The Gathering from about 1994-1995 or so. Just after the second generation of cards was coming out. I had some seriously rare cards, including a few first gen ones that I picked up like Lord of the Hunt. I had a Lord of the Pit, multiple angels, and a Shiva Dragon. It was good times, but it was getting expensive....
To save myself I sold them all and bought a Warhammer 40K Epic Tyranid army.... Out of the frying pan, in to the fire.
At least the Tyranid Epic army was so OP that I never bothered to work very hard in battles and won anyway. That needed some serious nerfing.
I've been really lucky on this front: many of the boards are leftovers from university research and engineering projects. Lots of undergrad capstone projects I mentored, research projects that wrapped up, or other engineering groups just kind of being done with the hardware.
I also had a couple of startup companies that I was working with fold and hand out leftover hardware as "ah well! better luck next time" going away gear.
Now, the tools to do the electronics work.... that's where my money keeps draining into. I'm a platinum member for AliExpress almost entirely due to buying small electronics parts. Thousands of packages over the last 5-6 years...
I can quit anytime I want to.
Of course, with the RPi production and distribution pipelines being so slanted towards commercial/industrial users right now I can't even get a new RPi board for a reasonable price (if at all) anymore. I picked up the Orange Pi 5 instead of a scalper-priced RPi 4 to give the OPi 5 a try and it's really good. I like it a ton more than the RPi boards for network services, which should be true given the price differential.
I also have been using the boards as part of university research and engineering projects for years now. Many of the ones I have on the shelf are pulled from projects when they wrapped up.