Surprised to see Toby gone so soon, he was scarier than Satan by a long way- as were the red-eyed Ood. It amazes me that great adversaries like him and Margaret are gone, yet the Sycorax leader remains!
Speaking of Ood, while I understand the point that they're not naturally evil, when possessed/otherwise affected with red-eye they make very good adversaries. I'm considering the Ood category as red-eyed Ood- after all, Sky and Toby might have been very nice people before their respective episodes too, but in those situations they became enemies. That it's not necessarily their fault they act that way, and potentially nice people/Ood have been taken over, just makes them all the more effective in my opinion.
My votes this round
From before:
04) Dalek Caan (various episodes)
09) The Christmas Invasion: Sycorax Leader (Sean Gilder)
16) Human Nature / The Family Of Blood: Scarecrow Soldiers
07) Bad Wolf / The Parting Of The Ways: Emperor Dalek & Fleet
New one:
22) The Stolen Earth / Journey's End: Davros (Julian Bleach)- guessing not many here will share my opinion, but aside from a couple of pointed comments at the Doctor, I wasn't impressed. The moving planets/destroying everything plan was too OTT and nuts, it just came over as ridiculous, and Davros was after all in command of a bunch of extremely ineffective Daleks, defeated far too easily by Donna and the half human Doctor.
By the way, I notice many people voting for the Reapers- can I ask why? I thought they were really good enemies, inventive, scary and one of them actually did get the Doctor.
Favourite quotes- difficult, very difficult. My favourites are mostly quotes from the Doctor, so it's harder to choose from other characters.
Series 1- "You would make a good Dalek", "Are you my Mummy?"
Series 2- "This is not war, this is pest control", narrowly beating "Does he still stroke bits of the TARDIS?"
Series 3- I'll have to be boring and agree about Tim Lattimers' quote, plus "The angels have the phone box" and "I am the Master"
Series 4- Wilf's speech at the end of Journey's end, plus Donna begging the Doctor to "Just save one" in Fires of Pompeii.