When it comes to playing styles, there is good an evil.
Good being great tennis, beautiful strokes, S&V, mental strength (though not all the time) and consistency.
Evil being chokers, cheaters, idiots, ugly tennis with no variety and mugs.
GOOD EXAMPLES - Federer, Murray, Del Potro, Soderling, Istomin, Berdych, Gulbis, Nalbandian, Baghdatis, Kohlschreiber, Schuettler, any S&V players, Stakhovsky, Dolgopolov, Montanes, Ferrer and Hewitt.
EVIL EXAMPLES - Nadal, Verdasco, Blake, Robert, Nadal, Devvarman, Simon, Monfils, Nadal, Koellerer, Pashanski and Nadal.
Gulbis, mentally strong and consistent?