of the modern Dr. Whos , Christopher Eccleston , David Tennant and Matt Smith , I like Tennant the best . he be confident in the role , dispense drole humor and have the skill as a actor to make the dramatic element convincing . he pair up well with Billie Piper and this series have one of my favorite episode ever , `` the Girl in the Fireplace '' with Sophia Myles . I own the second , third and fourth dvd series of Dr. who . it be difficult to rank they because each have episode which I love . you really can not go wrong buy any one of the three , all of which I would rate 5 Stars for brilliant writing , act , special effect and Murray Gold 's powerful music . Dr. who be perfect for family viewing . neither adult or kid will complain about watch the doctor .