What rock music has always needed is more bouzouki. Just step away from the three-guitar format and let some other instruments take the spotlight. Obviously, I enjoy diversification, which rock’n’roll sometimes needs a good shot of. Up steps Cat Stevens with his Greek heritage and bouzouki. Stevens liked to inject his music with touches of Greekiness, including singing in the language, using instruments not usually heard on the Top of the Pops, and the occasional cultural reference. It never made his songs any less accessible, but it definitely made his seem deeper and more interesting than other folky singer-songwriters around him. Win-win!