This post is inspired by a thread on the Facebook Group Whovians.
What are your favourite stories by Doctor? I'll start the ball rolling...
The Dead Planet, Invasion, Spearhead from Space, Pyramids of Mars, Earthshock, Revelation of the Daleks, Remembrance of the Daleks, Dalek, The Girl in the Fireplace and The Girl Who Waited.
This list isn't definitive, it's just for fun.