I like many things, but probably the most important one in a RPG is how and if the world reacts to choises I make be it initial characteristics or my actions. Both combat and an overall gameplay-wise. There’s no much point in varieties of options if they all lead the same routes. That feel from the Golden Era of RPGs’ games when you realized you could’ve done something in a way more other manners with absolutely different outcomes was something that hooked me and made endlessly replaying Baldur’s Gate and Fallout.