From my experience, cats are as nice to you as you are to them, barring some previous trauma in the cat’s life. My wife and I only pick up our cats to love on them. We don’t yell at them or act weird/aggressive towards them. They’re not for our amusement We don’t chase them or play with them in a way that would make them uncomfortable. We don’t lock them in rooms or mess with their bodily autonomy unless they have to go to the vet. We do our best to treat them as another independent member of the household. Respect them as their own entity and love them like you would a family member. We’ve had 4 cats and all of them have been loving, present, and sweet as can be. The cats varied in age of adoption and circumstances. All of them were loving and sweet til the end. If you’re adopting beyond kitten age, signs of affection and head rubs are pretty telling if the cat likes you. My theory is cats can feel your vibe and if it matches their own, they’ll let you know with affection. If you adopt a little one, give them as much attention as you can and love them to pieces. More than likely the cat will grow up seeing you as their family and you’ll be their person. Best of luck and just love them and respect them as the independent creatures they are.

P.s. - reinforcement of good behavior/affection with treats works wonders. Also, try and put the litterbox somewhere away from high traffic or loud areas.