Topic: How do you decide what platform to buy games on?

Just buy everything on Steam. You get the biggest library by a country mile, hardware permitting the best looking and running versions of any given game (okay, maybe not Unreal Engine stuff...), backwards compatibility pretty much forever, and you get to play your library on your handheld of choice.

Plus mods I guess, which can be useful sometimes. And nice perks like ultrawide.

Currently I'm buying inferior versions of games I enjoy on PC on the Switch 2 purely as an offline, portable, always available option. Once you have them, no one can alter them or take them away. I got the Switch 2 solely for that reason alone. I got Cyberpunk and Hogwarts and I plan on adding Indiana Jones and Fallout 4.

It'd be interesting to poll the console/PC preference. At a glance it looks like we skew towards preferring PC since this is more of a tech enthusiast forum?

I'd also like to know about how/where people play. I prefer playing sat down in a comfy chair in front of a big TV with minimal fuss, hence my preference for consoles. Can't imagine sitting at my desk in front of a smaller monitor with a controller!

Until the PS360 era, I was mainly a PC user. Then I discovered couch gaming. I bought all the consoles, regardless of whether it was Sony, Microsoft, or Sony. However, over time, I became dissatisfied with the performance of the consoles. The PS5 was the reason I switched back to PC. Since then, I'm back on PC completely. I have a gaming rig right in the living room, one at my desk, and for between times, the Steam Deck. I couldn't be happier. Therefore, I only buy games for PC now. Rare exceptions (like Astro Bot, for example) confirm this rule.
I enjoy playing older games with new technology. This is rather rarely feasible on consoles. That's why Steam is my way to go.
But I have also become more selective. I ignore games with external launchers as well as poorly optimized PC games (I hate stutter).