Those interested in learning banjo are often uncertain as to which technique they would like to study: clawhammer or three finger/Scruggs style.  If this is the case, just listen to music in each style and take up the one you like best.  Here is a small list of players of each style with a link to one of their music videos:

Clawhammer:
Georgia Fireflies
Steve Rosen
Michael Miles
Ken Pearlman
Steve Martin (both styles)

3 Finger Style:
Earl Scruggs
Bela Fleck
Bill Keith
Don Reno
Danny Barnes (both styles)