As for me the best casino site or the best casino is the one I win and not the one I lose always. The casino that favoured me is the best. And if that casino doesn't favour me again then I will choose another one that is good for me. Casinos are differ so what good for you might not good for me. So if I say that I like winz.io it might not good for others therefore my best casino sites or casinos are not stable but the one that good for at the time is the best one for me.
I am different from you, because for me the best casino site is a site that is trusted and always gives me comfort when playing on it. I mean when I win, the withdrawal process can be fast, and if I want to contact customer service they can provide a fast response.
There are some sites that I always play on, regardless of how often I lose and how often I win, because I know it's down to luck.