While there are many behaviors of cats. Keep in mind that each cat is special in their own way. And may act ways that are slightly due to their personality, or their moods. They can sometimes be where playful and play nice and there can be times that they can be anger like that time you forgot to feed them. But everything can be forgotten if they starting to purr that sound is a wonderful sound it also can help you sleep well, and if you have a hard day at work and your cat jump on your lap and starting to purr then you forget everything that happened that day.
Pictures taken with my Samsung galaxy A21s