I played through them all a couple of years ago. They hold up great in my opinion, and 2 got a great remaster, so the graphics are solid. If you are talking about ODST specifically, then I’ll say it’s one of my favorites. It has a totally different feel to it that helps to flesh out the game universe a lot, and being so damn squishy makes the gameplay a lot different. There’s a sort of noir vibe to it too, so it definitely stands apart from the other games.
I have an S24 and I don’t use the game center myself, in fact I un-installed it. I paired up my Xbox Elite controller to test it and did not see any kind of ad or pop up, but I do have the Game Pass app installed. I was using LG phones for the last several years and was going to get a Pixel 8 since LG stopped making phones, but read terrible reviews on the Pixel 8. I was worried Samsung was going to be a terrible, locked down ad ridden experience, but honestly it’s been fine. Lmk if I can help any further, and good luck!
Nintendo: “YOU’RE. NOT. WELCOME. HERE!”