When you think "Oshkosh", (or for those of you who've been around a while, when you think "Rockford" or even "Milwaukee"), what aircraft come(s) to mind?

Is there one aircraft or type that stands out as an icon? A field full of RVs, the P-51s and friends in the Mustang Corral, Cessna 195s camping together, powered parachutes flying over the farm in the evenings...?