Yes, Castiel remembered liking the burgers. Quite a lot. Too much in fact. He knew, of course, that it had been the work of Famine on his vessel that had made him crave so intensely that he had no control to stop eating the things. But he was human now, and didn't like the idea of something like that happening again: human urges and cravings. He didn't even want to be hungry, didn't want to cave in to the need to do something that seemed completely unnatural to him.
In the future, he would avoid it as best as possible. Castiel nodded dutifully, feeling uncomfortable about this situation in more than one way and eventually just ended up asking for the soup Sam suggested. "Dean does eat rather disgustingly," he murmured, more to appease the situation with a sense of levity than anything else.
The soup was hot and it smelled good, Castiel supposed, but once they were seated and he was holding the spoon over the bowl almost longingly, he blinked and looked over at Sam. "Tell me about your reality." He was interested and looking for a distraction at the same time.