Unless they've completely changed the cafeteria staff, they do smile a lot and they are quite friendly. They were to me anyway, and I see no reason why they shouldn't be to anyone else.
And yes, probably the two best things about the cafeteria are the banana cream pudding and the картофени кюфтета с кисело мляко, no idea how this is in English, but I guess you can understand it, so it's OK.