I think Rick is an amzing Guitar player and his Rattlesnake Shake was the best live version of that song ever. But Stevie SUCKED on the Tango tour (She is MUCH better now, compare the tango Stand Back to the new on from Vh1) And Billy to me added nothing to the band. So I belive there are 3 defining eras of Fleetwood Mac. Peter Green Era, Bob welch Era and Rumours/SYW era. The Tango-Time era was just very average.