His creative engagement with piano music is well displayed in the theme-based recitals for various radio stations, the Deutschlandradio, Radio Suisse Romande and Westdeutsche, Mitteldeutsche and Hessische Rundfunk and others. Sticken also works with experimentally minded partners such as the Kuss Quartet or the author and pianist Cord Garben and tries out new methods of presenting music and text with the poet Oskar Ansull. Recordings for the CD label Thorofon and many radio productions of seldom heard masterpieces by Clementi, Reubke, Strauss, Martin, Honegger, Korngold and Rota provide evidence of the wide-ranging nature of his repertoire.
Through his teachers Vladimir Krainev, Vitaly Margulis, Gyorgy Sebok and Alfred Brendel Klaus Sticken has become familiar with very varied approaches to music. Besides his concert activity serves as a professor of piano at the MUK Music and Arts University of the City of Vienna in Austria.