For the last week there has been a poll on the sidebar of the site.

The Question was “Which is your favourite episode of Doctor Who Series 3?”
Smith and Jones
The Shakespeare Code
Gridlock
Daleks in Manhattan
Evolution of the Daleks
The Lazarus Experiment
42
Human Nature
The Family of Blood
Blink
Utopia
The Sound Of Drums
The Last of the Timelords

In first place came “The Last of the Timelords” with 16 out of 63 votes (25%). Close behind, came “Blink” with 15 out of 63 votes (1 vote less than “The Last of the Timelords”) making second place with 23% of the vote.
In third place was “The Sound of Drums” with 11 votes (17%).
Fourth place went to “Utopia” which had 5 votes (7%).
“Gridlock” and “Human Nature” tied at Fifth place, each with four votes (6% each).
In Sixth place came “Smith and Jones” the opening episode for Series 3 which managed to get 2 votes (3%).
The rest of the episodes; “The Shakespeare Code”, “Daleks in Manhattan”, “Evolution of the Daleks”, “The Lazarus Experiment”, “42” and “The Family of Blood” all received 1 vote (1% each).

Here is the poll results picture for proof;