There is a long tradition of FOSS enthusiasts to blather on the software and tech they use. I don't know if it matters to most, I doubt it does, actually. But, why let that stop me?
I have a self assembled desktop AMD Ryzen system which is my main work horse. I've recently equipped it with a new AMD Radeon RX GPU, and thus it can serve double duty for games.
I find myself not using a laptop much anymore, but do employ a NextDock with my phone for lightweight computing sometimes.
In terms of desktop environments, I use KDE Plasma. I typically try and stick to operating systems with long and stable release cycles. Though find myself on KDE Neon as of late. I find its long term stable base with rolling releases of KDE's software is a nice sweet spot.
Vivaldi has become my browser of choice in recent years. While chromium based and not FLOSS it is employee owned and takes user privacy quite seriously.
I was once a very committed free software absolutist. I am no longer. I prefer free and open source software, and any code I write will be under a libre license; but I no longer punish myself by abstaining from proprietary software.
Linux is my preferred platform for gaming, I have a Steam Deck which compliments my desktop computer for this. I do not dual boot for PC gaming. I have been a big advocate for gaming on linux with Wine for quite a number of years, and now quite enjoy the fact that Valve has made this mainstream with Proton.
For anything else, I have a Nintendo Switch.
I use a Samsung phone, with as many google products and services disabled. I have on and off for years used “DeGoogled” android phones. Unfortunately, I find that Google themselves are making this increasingly more difficult to do over time.
Telegram is my messaging platform of choice at the moment. There are a few better alternatives, but the network strength of my contacts keeps me a bit bound to it these days; but it remains client agnostic and maintains a floss client, which are several points in its favor.
Mastodon is my current preferred social media.
I currently use Nebula as a youtube alternative.
I self-host this blog and a FreshRSS instance to keep up with news.