His music is beautiful, exceptionally skilled and imaginative, with an impressionistic mood (though not the Debussyian style that word usually denotes). He was said to be shy and diffident. Either because of exceptional lack of confidence or laziness he was incapable of completing more than a few large-scale works. He wrote some piano pieces and songs, a few choruses, and about a dozen small but evocative orchestral works, some of which were fragments from his unfinished opera Zoryushka. His inability to finish a commission from Diaghilev to write the score for a ballet, The Firebird, led, famously, to its being given to the young Igor Stravinsky and launching that composer to international fame.