We really need some added cat around here: our old cat (she made it to 22 years, I think!) was extremely affectionate and unusually for a cat would even come when called! Only problem is she was a bit too affectionate and wanted company basically all the time, being quite happy to sit outside the bedroom door whining all night to remind us of that fact; we'd even find her lying in the hallway with her chin on the floor waiting for us to come back if we'd been out. I think she occasionally gave us a "look" if she wasn't in the mood but that was quite rare, she'd generally be more than happy with the attention whenever it was offered.
One of my cats is like that. She's totally attached to me, follows me everywhere, and will scratch at the door forever if I lock her out of my room.
She's scared of everybody and everything else though.
As lovely as my cat is. I'm much more of a dog person. They're a lot more fun and unlike cats they seem to ask you to play, whereas you have to ask cats to play with you. The answer to most problems most people have with dogs, is to just get a really small dog. My dog was somewhat smaller than my cat, and was able to do things like, sleep on you and didn't need walking every day either, since a run around the house or garden would wear him out completely.
A few of my cats ask to play. They have this fake raccoon tail toy and carry it around in their mouth while making noises until I play with them.