All Doctors brought into the series their own unique style. The series has morphed from the wise Grand Father figure of Hartnell to the modern strong woman of Whittaker. I loved the Pertwee/Tom Baker era and admit my interest waned until Eccelston appeared and Tennant just made it better. I love how it has evolved from short simple episodes to longer complex shows. Whittaker gives it an extra dimension and may it continue to evolve as we all continue to evolve through the space/time continuum.