Cats not missing their owners is a bunch of malarky. Both of our cats come to see us when we get home, unless they're in the middle of a particularly good nap(usually cozied into some well hidden spot). They love their people nearly as unconditionally as dogs will if treated the same way. People often assume that just because a cat will still like you and make for a decent pet if you pay little attention to it, that doing so is the way it might as well be done.
When my parents got divorced, my mother got custody, and my father was rather upset, as expected. He was given a tiny kitten and immediately became rather attached to it (according to my grandmother he missed us quite a bit, and having a little baby of some sort helped). Right around the same time, maybe even before getting the kitten, my father badly broke his leg(dirtbike therapy) and was more or less relegated to the couch, spending all of his time with Husky(short for Husquavarna, see dirtbike). They became practically inseparable, Husky would walk with him to the corner store and wait outside, played fetch with a balled up strip of sweatpants torn fir over the full leg cast, and once my dad started driving again, learned the sound of his truck and would be waiting at the top of the driveway as soon as he pulled into the neighborhood. When my dad got custody about a year later, Husky was not fond of my baby sister getting attention, and never really liked her. For 16 years Husky continued to meet my dad in the driveway, fetch from time to time, and stay nearby for much of the time, regardless of fights with dogs, other cats, and feline AIDS(and subsequent pneumonia). Last spring he was still doing quite well, but died of a stroke, and while I wasn't there to see it, I know my father shed more than a few tears.
And trust me, In my life I've known dozens of cats(Dad's first wife(half brother's mom) was a bit of a crazy cat lady, had anywhere between 13 and 26 at any given time) and saw just as many different personalities.