I never saw the horror in the Daleks that others did. A good friend of mine admitted she used to have nightmares about them when she was little. I think the 4th Doctor shuffleboarded/curled a dalek down a hallway. And the 5th Doctor defenestrated one (classic!)
I have to admit I agree to a point - though I think the real horror about the daleks comes from a combination of their seemingly ridiculous exterior packing such a powerful punch (erm... death ray) and their origins as humanoids (or, in some cases with New Who, humans). Plus the whole merciless-emotionless-killer thing. That's kind of disturbing, too.
Now, Davros, on the other hand....A genuine foil to the Doctor. Arthritic, wizened, crippled, welded to a legless wheelchair, gnarled physically to match his twisted mind, just about everything that wasn't a strident screetching rant was pure classic downtalking Villian's Monologue. For a Doctor Who creation, he had a very "classic monstery" feel to him, like Dracula, the Creature from the Black Lagoon and the Mummy.
In this... I entirely agree. There's something just so deliciously twisted about Davros, it's hard not to like (though 'like' isn't quite the right word...) him as a villain.
_________________I am a conlanger, a scuba diver, a belly dancer, an introvert, a reader, a writer, a gamer, a Superwholockian, a pianist, a clarinetist, a sailor, a CGI artist, a singer, a dreamer, a wisher, a liar, a hope-er, a pray-er, and a magic-bean-buyer. Who are you?
Edit: Substituted a string instrument for a French interjection.