Personally, I love the Xbox Series X and even upgraded to the 2TB Galaxy Black Edition and despite also owning a PlayStation 5 Pro, Xbox remains my primary gaming console (just like PlayStation 4 Pro did despite also owning an Xbox One X) as it's simply the superior platform out of the two.
First and foremost are Microsoft's published games. From my game of the generation in Starfield to my 2021 game of the year in Halo Infinite to other great games like Hi Fi Rush (which thankfully will live on at Tango Gameworks under Krafton and hopefully, they don't fuck up the sequel), Gears Tactics, Call of Duty: Modern Warfare III, Call of Duty: Black Ops 6 and the upcoming Indiana Jones and the Great Circle. With an 18 game announced road map post 2024 in which 13 of them are of interest to me, Microsoft has by far given me their best games lineup in their console history and it's not even close.
Second is Game Pass Ultimate which for someone like me who doesn't give two shits about ownership or collections, being able to play Microsoft's games day one as part of my subscription is what I want all publishers to do eventually. Adding in third party day one games like the upcoming Stalker 2, Atomfall and others make the subscription service a steal even at $20 a month.
Third is Backwards Compatibility which also applies to Game Pass Ultimate to an extent. Being able to play through all the Halo games this past August for the first time ever via Game Pass Ultimate was awesome. This is simply an extra positive and benefit that gets overlooked. Even better is the fact that even if I don't get a chance to complete games this generation, I know that they will carry over to next generation.
Fourth is Free Cloud Saves which has saved me several times. Such a great added benefit and bonus to the platform that rarely gets mentioned.
Fifth is a six game refund policy every calendar year. This has saved me some extra money. Sometimes I just want to tryout a game because im curious and knowing that I can refund the game if I want is such a huge perk because it allows you to play games for a few hours without the risk of losing $60/$70.
Sixth which perhaps for me is more like second is the ability to use the Xbox One controller which is my favorite and best controller of all time. No gimmicks and no bullshit. Just a standard controller with 40+ hours battery life on a single charge. Feels great and no stupid texture on the back like the Xbox Series X/S controller and in my opinion, the better directional pad.
Seventh is EA Play being in Game Pass Ultimate. As someone who wants to play through the original Mass Effect trilogy for the first time, being able to do so part of my GPU subscription is an added perk.
Eighth is Ubisoft+ being available on Xbox (don't know when it's coming to PlayStation) as this allows me to play the best version of their games day one for an $18 monthly rental.
Other bonuses like Quick Resume and the ability to buy one copy of a game and be able to play it on Xbox, Windows Store PC and via Streaming are huge benefits that I don't use but im sure are huge for many people.
To each their own but as long as Microsoft manufactures and releases a console, im going nowhere because the benefits and positives and perks I get on Xbox are simply superior for me personally compared to Sony and Nintendo. Xbox baby!!!