1960s counterculture.
doone'sownthing (third-person singular simple presentdoes one's own thing,present participledoing one's own thing,simple pastdid one's own thing,past participledone one's own thing)
- (idiomatic, possibly somewhat dated, informal) To do what one considers to be bestsuited or mostsatisfying for oneself; to do what expresses one'sdistinctiveinterests ortalents; to do as onechooses.
1977 October 3, “Behavior: Psychobabble”, inTime, retrieved8 December 2019:The psychological patter of the '70s is as inescapable as Muzak and just as numbing: Are you relating? Going through heavy changes? In touch with yourself anddoing your own thing?
1988 July 1,John S. Wilson, “Sounds Around Town”, inNew York Times, retrieved8 December 2019:This weekend, Mr. Rouse isdoing his own thing: leading his own quartet with John Hicks on piano, Santi DeBriano on bass, and Ed Blackwell on drums, and playing his own compositions.
2010 December 11, Gill Sutherland, “I want my kids to rebel”, inGuardian, UK, retrieved8 December 2019:OK, so I want my kids to find their own way,do their own thing, become their own people.
do what one considers best