Mostly a reader, rarely post, so here is my short checklist for choosing a casino site. After getting burned once or twice I stopped going by ads alone.
I always start with licensing: find the licence number and look it up, because some sites quietly block certain regions. After that I look at banking: I want at least one fast e-wallet option, and there should be no weird fees on cashouts.
Never judge a site by the bonus alone. Read the wagering and the max bet rule, and live tables often do not count at all. A useful overview with bonus rules, app info and payment methods is worth a read here [url=https://www.tumblr.com/soldkryptohub/829748173914374144]Lottoland[/url] and it saved me some time.
On mobile I mostly use the browser version, so I check how the lobby works on a small screen. Ask support one simple question first: a real human reply beats a bot loop.
That is about it. Only play with money you can afford to lose.