I mostly play rogue likes with controller and would like a XBox/Playstation style controller
I'm assuming you dont need gyro or touchpad that you'll get with PlayStation / Nintendo compatible controllers, however if you do want those features the Switch Pro controller & the DualSense (PS5) play nicely on my Linux computer (with steam)
Out of the two I'd probably recommend the dual sense since you're used to Xbox / Western PS layout rather then Nintendo / Japanese PS layout.
I've heard good things about the 8bitdo controllers, but can't comment on their compatibility or quality. The contemporary xbox wireless controllers I don't personally like, the current ones have this extra grippy texture on the back and thumbsticks that doesn't sit well with me and the lack of rechargeability ootb is disappointing for the price.
It doesn't add anything unless you have the muscle memory for the dpad movement over joystick for 8 direction input. I just find it awkward, and can't switch directions as fast. The corner zones also feel a little off compared to the cardinal directions, but this is likely just my muscle memory hampering me and not the game itself.
I feel like my issues with it are definitely nit-picky, and I can definitely see others enjoying the game and not caring whatsoever. I guess I just find it frustrating that a $79.99 CAD remake doesn't allow for both input methods.
For example I know my partner enjoyed playing with the joystick. And in other games like cuphead that give you the option he still played with the joystick instead of the dpad. Perhaps I'm just a little stubborn :p
About the only rationale I can think of is the joystick being better then the joycons dpad for movement, particularly when inputting two directions at once. I personally use a pro controller so I don't personally suffer from that in games where I use dpad, but I assume most people just stuck with joycons outside of the more "hardcore" switch owners.