First thing I see is "CAN I WITHDRAW MY WINNINGS WITHOUT ANY HASSEL?" and then check KYC rules and lastly this might be a vey unpopular opinion but I like to see the UI of website because if i am willing to loss my money in there atleast make it visually appealing so it doesn't look so bad after all.
Same thing with withdrawal in other currencies. List supported ones and include international, not just dollar and bitcoin.
Many online casinos also get more users when they offering customer chatbot support in international languages, more than English.
as you are already here in the forum, and in the gambling board section, you can easily now browse the respective threads of each casino and bookie and see for yourself which ones are reputable and not. just by looking at the trust summary of each rep would give you idea how the site is doing to their customers. there's no hustle in withdrawals if you stick to top and credible casinos found in this forum.