My baby doesn't really go for people food (though he often gets confused about the fact that my sister is eating something other than cat food, like... why?), but he does overeat when we don't carefully monitor his diet. And he always thinks he wants things that smell spicy, but he doesn't actually like the taste. The worst thing with him is that he's addicted to plastic. He's always stealing garbage that we've got to wrestle away from him.
The other cat in the family, though... he's pretty omnivorous, and he'll steal right off your plate if he gets the chance (and he tries to drink coffees and teas if you don't watch your cups). His favorites include string cheese, yogurt (unless it has artificial sweeteners), oatmeal (the chewy bits, not just the milk at the bottom of the bowl-- when he was a kitten, my dad spoiled him by letting him just lick up anything that wasn't poisonous to him, and since he's not predisposed to weight gain or health problems in general, it hasn't done him much harm-- if anything, we think he's going to be one of those thirty year old cats that people can't believe is still running around like a kitten), and vegetables! He likes cooked carrots and green beans all right, he doesn't care about corn niblets, but loooves the cob, he used to scrape artichoke leaves with his teeth like a person, and his favorite is asparagus.
The only real problem with him is that he steals food you're trying to eat, and that he goes for food that makes him gassy and then he goes to cuddle with you for comfort because his tummy is upset and he has no idea WHY. And then he produces powerful odors.