Cats are a great pet. They are among the easiest animals to care for. My indoor cat went to the vet once since I got her, to have her claws out. They really only require food (though indoor cats will also need a litter-box and all its related work and cost) and a little bit of love. They can do well in small or large spaces (though it depends on the type of cat, more personality than anything else), some like water (there's a breed, don't remember which off the top of my head, Turks?), and all require only a small amount of care for a loving (or not so loving, you can't force them to like you) companion.