Gracious, I've had so many cats and kittens in my life, I could write a book. And, I've never been without a dog and cat/s for a day in my life from childhood on.
Not saying it doesn't happen, but I have never ever seen one of my cats eat their own feces. Perhaps lick/clean themselves in the hind quarters after using the litter box, but never heard of a cat eating their feces per se. That's a new one on me unless there is some really unique reason for it.
Every cat is so different, even grown cats from the same litter. After my 21 yr old male cat finally had to be put to sleep because of renal failure, I adopted 2 young brothers from Sicsa when they were 3 months old. They're as different as night and day. They're all black with one small patch of white on the lower part of their bellies. For some reason, black cats and Siamese cats seem to have slightly different personalities than other cats I've had. They seem to have more distinct behavior and vocalizations for whatever reason.
One thing I can say without a doubt, keep the cat litter clean, scoop the poop out at least once a day, especially if more than one cat uses the box. They are instinctively very clean animals. Too much poop in the box, or too much urine odor, not a good thing and don't be surprised if they find a nice clean area outside the box to do their thing. And if you've had another cat in the past that urinated in a spot, for some reason expect other cats to do the same. Avoid that by removing any trace of a previously urinated upon section of carpet, or expect followup behavior from a new cat.
One of the two I have now absolutely adores my dog, and the dog tolerates just about anything from him, even coming too close to the dog's "chewies". The other one has a distinct "attitude". The second adores me, goes into rapture just sitting on my lap, the dog comes along, watch out. The easy going one is content just sleeping on the bed with me and the dog, no territorial thing, the second, not so much. It can get interesting at night in bed with all of them.
And the 2 brother cats have entirely differently food likes and tolerances. One can eat and never throw up; the other frequently has the "urps".
After loosing too many cats to car accidents, I've learned that if adopted as kittens with no free roaming experience, they're quite happy and content being indoor animals. Guess what they don't know/experience about outside freedom, the easier it is for them to be completely content being strictly indoor cats.
While I don't necessarily condone or encourage de-clawing, it does make everything easier in the long run. Many people I know have given away or just let their cats out and hope they disappear because they do tend to sharpen their claws on material, especially furniture. With out their front claws, little to no damage to things and less likelihood to abandon them. One rule vets seem to agree on, do not declaw their hind feet claws. If they get out, they still have a fighting chance to defend themselves to some degree with back feet claws still intact.
Food, it's a learning curve. Some cats can eat just about any brand, dry or wet, and all's good. Others have picky taste and sensitive stomachs. One of my brother cats eats anything and everything cat food wise, never ever vomits; the other other one- expect an "urp" every once in a while.
Both of my cats come when I call them by name. One is happiest on my lap, the other one perfectly happy sleeping alone on a couch pillow. One can snuggle up to my dog when it's cold, the other one simply cannot abide sleeping near my dog and vice versa.
This current twosome of cats has never been outdoors, they love the enclosed Florida room to bask in the sun, but otherwise know no different life and are content. Once cats learn the glories of wandering outside, hard to break them of that, and greatly increases the chances of being hit by a car, etc. I've learned that the hard way, it's extremely painful to go outside and find your beloved cat dead and mangled in the street after being hit by a car.
Unless the cat(s) are long-haired, they require virtually no grooming.
Versus a/my dog, I can leave the cats for a couple of days if absolutely necessary if they have plenty of dry food and water, clean litter box, etc. The dog, no way, he has to go outdoors for a potty break at least twice a day.
I've never lived without at least one cat and one dog, my married son as well. Cats, as well as dogs, bring a unique experience/caring and depth to one's life. Hardest part is when you lose them, when they die, or have to be put to sleep for a variety of reasons. It's especially difficult to take that friend and companion into the vet, say your goodbyes, and see them go under and pass before your eyes while they are looking at you. Hard, so very hard. They put so much trust into you, saying goodbye no matter how necessary, is a gut wrencher. Have to stop now, got a big ol' lump in my throat-
uke: 
