Another massive vote for any pertwee monsters, especially the Draconians, Ogrons (great story about them in a sec), Sea Devils, Autons, Axons, Drashigs, anything at all. Classic Sontarans, modernised, wirrin, vervoids, the valeyard (wouldn't it be interesting if they got back a past Doctor to play him?), 80's ish Cybermen or some design that are less Iron Man and more Borg, they really deserve a story which does for them what Dalek did for the Daleks. Be nice to see the Sycorax again sometime too
Sea Devils, and Daemons, I think I want most. Proper horror Cybermen, But for unlikely, unfortunately to say, the Valeyard.
(Ogron story - in a Tennant comic you find out their planet is in economic collapse after the PR disaster of an old man with white hair wiping the floor with them, and the Judoon subsequently taking over the muscle for hire angle in the galaxy and undercutting them

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Characters? Torchwood back on TV, plain and simple