Tchaikovsky displayed an unusually wide stylistic and emotional range, from salon works of innocuous charm to symphonies of tremendous depth, power and grandeur. Some of his works, such as the Variations on a Rococo Theme, employ a poised "Classical" form reminiscent of 18th-century composers such as Mozart (the composer whose work was his favorite). Other compositions, such as his Little Russian symphony and his opera Vakula the Smith, flirt with musical practices more akin to those of the Five, especially in their use of folk song.[111] Other works, such as Tchaikovsky's last three symphonies, employ a personal musical idiom that facilitated intense emotional expression.