Ascot
It's a shame they built on Gatow. I went to the Christmas Market in Berlin last year and they flew us into Schoneberg which was the East German airfield 15 miles east of town. I had been there before on a Stockholm agreement visit and Interflug put us up in a crappy airport hotel. I was amazed to see that the facilities were still as basic and the Ubahn into the city centre still takes half an hour.
Oh for Gatow and the umsteiger ticket into the Kudamm. Many a visit to the Hofbrauhaus (now gone) and strange bath nights near the Sophie Charlotte platz.