When I visit Scotland I always have Fish and Chips. Greasy? Yes, but it tastes wonderful. I lived there for six years and it's what I miss the most. Well, that and Cadbury's Fruit and Nut Bars. :-)
When I visit France I spend my time in southern France. Paris is a noisy dirty city. You have to go there once to say you've been there, but after that, don't waste your time. Southern France, on the other hand, is just beautiful and a wonder to behold.
When I visit any country, I try to visit as much as I can as quick as I can. (I love the bus tours) After I make the quick tours, I then focus on what I really liked and spend the rest of my time there.