So when I go to a betting site I prefer three main things: Trustworthiness, timely and efficient deposits/cashouts, and good support.
Trustworthiness is a major thing for me because I don't want to deposit and have them run off with my money. I would want the platform to receive my money and have it ready for me to play by one or two confirmations(standard protections against double spends which I don't mind), and if there are any problems a good support should be able to help me fix them(or try to fix them) with decently fast response times(or at least a live chat but that isn't really something I worry about too much, long as it doesn't take a week or something to respond or something then I'm fine with a couple hours/a day). I don't really mind KYC but I would prefer to not send it over.
How would you know if a site is trustworthy by looking at it?
you cant assess the trustworthiness of a new site. it will take time to establish their reputation in the market. but if you are a new gambling site and you dont have anything to prove to the players yet, one way is acquiring a decent gambling license if you can afford one. this means, you are serious about this business and not just a fly-by-night gambling website.
if not, it will take time and many players to attest the credibility of the site, good feedback and reviews from previous players will give you insights on how that site is treating its clients.
and on my end, no kyc, fast response of the support, easy txs for deposit and withdrawal, low house edge, provably fair of course!