I can't imagine life without a cat. Of course, I spoil her, but I've also got one of the nicest, most well-behaved cats ever. Some cats can have behavioral problems, and she has none. Uses her litterbox, won't go elsewhere. I can have her in my room and know if she needs out, she'll let me know rather than just deciding to go in my room.
She won't get up on the counter tops, so you can leave tuna out and know it will still be there. She won't go outside, so you don't have to watch for her as you're going in and out. If you give her enough toys, she leaves the furniture alone.
She'll play with us, but she won't attack anyone who comes to the house. At the same time, she's not fearful of people and will come out and be sociable. The last time my step grandfather was here before he died, he sat down on the couch. He wasn't doing well and was in a good bit of pain. She seemed to sense it and curled up next to him on the couch.
She also can sense when I'm sick or if my asthma is bad and will come and try to comfort. She doesn't care that I move around when I sleep; she just moves herself if I start.
Really, I spoil her, but I've got such a great cat that she deserves all the love.