self-will

from WordNet (r) 3.0 (2006)

self-will
    n 1: resolute adherence to your own ideas or desires [syn:
         {stubbornness}, {bullheadedness}, {obstinacy},
         {obstinance}, {pigheadedness}, {self-will}]
    2: the trait of resolutely controlling your own behavior [syn:
       {self-control}, {self-possession}, {possession}, {willpower},
       {will power}, {self-command}, {self-will}]

from The Collaborative International Dictionary of English v.0.48

Self-will \Self`-will"\, n. [AS. selfwill.]
   One's own will, esp. when opposed to that of others;
   obstinacy.
   [1913 Webster]