What Matters Beyond the First Impression?

I’m comparing a few online gaming platforms available to Malaysian users, but I’m trying not to judge them just by how polished the homepage looks. For those who have actually tried different options, what made one platform feel more reliable or convenient than another? I’m particularly curious about things like how clear the registration process is, whether the payment options are practical, how responsive customer support feels, and whether the rules are easy to understand. Are there any small details you now check first that you used to overlook?