Here's my take on what I can say.
I've played very little PlayStation, so I can't really speak about it. However, I can say that I'm not generally a fan of PlayStation controllers (I like the 'meatier' feel of Xbox controllers a lot better). PlayStations seem to be adequate video game consoles, with the PS4 being overall stronger than the Xbox One but the PS5 being about on par from the Series X (from what I've gathered, at least).
I HAVE played a good amount of Xbox. I started with a 360 and moved to a One, a One S, and finally my Series X. I am a fan of the controller design, but I've found the joystick rubber to break under intense use. Also, reliance on batteries in this day and age is counterintuitive and annoying. For the price, a Series X/S offers a good deal, with a simple, clean UI, the undeniable appeal of Game Pass, and solid performance on most games. The console has it's issues, but for $500 it offers excellent performance.
Nintendo feels like the sleeper agent of the gaming community. The Wii, for instance, outsold the 360 and PS3 combined. Nintendo consoles and games have always put family and child friendly gameplay first, which has created an odd isolation from the rest of the gaming market. Nowadays, Nintendo continues to create amazing games, but they're also becoming more and more hindered by weak hardware (in the Switch). Nintendo's strategy has always been to be the fan-favorite, and not the most powerful console. In that regard, they succeed quite well.
PC gaming truly feels like optimized gaming. With Steam, emulators, and countless other resources available freely for download, there isn't much of a limit to what PCs can do. Furthermore, the ease of upgrading and replacing parts makes it simple and logical to emphasize some parts of the machine above others. They tend to be much more expensive than consoles, but PCs offer a wealth of gaming resources that ultimately centralize them as the best gaming platform. At least, in my opinion.
Finally, mobile gaming is a bit of a sore subject for most conventional gamers. When most people in our dynamic think of mobile gaming, they probably imagine a sixty-year old man playing Candy Crush with ad breaks on his phone. However, the future of mobile gaming is promising. New developments such as Xbox Game Pass on mobile mean that streaming may ultimately turn phones into an all-in-one device. Nevertheless, as promising as these developments are, they are still just developments, and mobile gaming remains a mere offshoot of gaming.