I like Oswin Oswald the Best

There is something about a Dalek that tries so hard to maintain her sanity despite being transformed into a Dalek. From what I heard, series 9 begins with Daleks again. Spoilers prevents me from saying anything more. So I prefer Oswin because her inner world is human, so human, she manages to help the Doctor ensure his safety by having all the Daleks forget knowledge of him. My impression is that this keeps Earth safe since they cannot invade what is his home away from home. Overall, Oswald Dalek is compassionate, and willing to choose death if only to prove her sane at this point in Series 8.