Yeah that would be my first question - when was the last time your coils (if at all) were replaced? I'd definitely throw a new set of spark plugs in, at a minimum. Cheap enough thing to try, at least.
Original coils. Plugs probably have 45k on them so that probably has something to do with it.
Just took a plug out. Doesn't look abnormal to me. Think this could cause rough idle?