Can cats be food obsessed?

Backstory:

My cats are almost 6. Previously free fed dry, became obese. Switched to canned and reduced calories in April. Metabolism and weight loss slowed a few weeks ago, upped food intake. Currently get 210 calories 3 days a week, 180 rest of the week. Fed 4x a day.

So the question is, can cats be food obsessed? Sometimes my male won't even sleep after he eats. Sometimes it's like he's just waiting for the next feeding. After I upped his food intake 3x a week, weight loss resumed. I can't tell if my cat is just obsessed with food or if he's actually hungry. He's always been more of a glutton than my female. Should I feed 3x a day, or would that make it worse? 

I believe some cats are food obsessed. It can be from not having enough food when a kitten (for example, abandoned and lived on the streets for a while). It can be because they are bored with either their environment or food. It can be, well who knows!
Some cats can self-regulate; Ritz isn't one of them.
What food are you feeding him? Is the calorie content on the canned food (just wondering where you're getting the caloric content).
Some "weight loss" foods actually have more carbohydrates, less protein and less fat--exact opposite of what cats need, even when on a 'diet'. So they feel hungry. Such is the case with Ritz: if I fed her a low fat protein like turkey or rabbit, she is hungrier than if I feed her pork or beef.
I would feed him three or even four times a day if your schedule permits.
Ritz is much happier, calmer, less food obsessed on the weekends-when I can feed her three times a day.
I am still learning that not all meows mean Fed Me. Sometimes it means, pay attention to me. Play with me. Or, well who knows (we're dealing with cats after all). And, appetite is different from hunger.
Here is an article about obese cats. And one about how much food a cat needs.

To add to what Ritz said, try playing with them before mealtimes. It'll help fulfill their natural hunt/kill/eat/sleep pattern, which is of course also good for weight loss! My own boys are far more content after a meal when they have to work (play) for it. Even a simple 2-3 minute play with their wand toy or laser pointer helps. I don't have to leave them completely exhausted before they get fed.