Personally, I prefer playing on mobile since I’m used to it. Besides, I have back issues that prevent me from sitting on a chair for long periods.
But as long as the website is well optimized for mobile, then everything is good.
Better still if it has a mobile app.
I still keep asking myself my most crypto casinos do not have mobile apps as compared to their crypto exchange counterparts despite all of them being in the same industry and some making nice revenue out of it.
To me, an app makes the whole experience of playing games easier and less like to get log in details phished. For example, I don't remember the last time I visited an exchange site on my mobile browsers, despite most of them being optimized for mobile phones too. I always visit and use the mobile apps.