I really just love all Doctor Who episodes well maybe not all but most of them. But what I will do is list them by incarnation. Though I will tell you my most favorite episode I would quite love out of all is,
The Day of the Doctor. ♥♥
9th - Rose, I love the introduction of how to the Doctor greets and saves Rose. Also how he saves her.
10th - Christmas Invasion, I gotta love this one as well. You have an adorable uncautious alien that we have laying in bed trying to be regain his energy and once awakened he becomes the most charming and determined alien we all know today. I also love how cute he may look in 9th’s jacket.
11th - Nightmare in Silver, I love the battle between evil and good in the inside of the Doctor’s mind as he is put to the test of defeat in chess. Very dramatic scenes I would say during his role in his mind but I love this episode of his.