Ewww. I can eat the little smoked oysters, but oysters on the half shell is vile. They DO slide down, like swallowing snot. Sorry. But they're gross. On a par with black pudding. I mean, really gross.
Never had pickles on grilled cheese before, but it sounds good. I usually put mustard on mine. I used to have a friend who liked his grilled cheese sandwiches with peanut butter on them. I couldn't bring myself to try it, though.
And yes, glasgow_girl, the pickles in the UK definitely fall short of the REAL thing. Sweet pickles are common and some are quite nice, but there is no such thing as a good dill pickle on that side of the pond.