The Volturi Cast!

Do you like them? Could they of chosen better? I think so with the three leaders, but have your say! Tell me your favourite(s) Volturi Cast Member(s) and why. Also tell me you worst Cast Member(s) and why + tell me who could have done better! Thanks!
The Volturi Cast:
Demetri: Charlie Bewley
Caius: Jamie Campbell Bower
Felix: Daniel Cudmore
Marcus: Christopher Heyerdahl
Jane: Dakota Fanning
Alec: Cameron Bright
Heidi: Noot Seer
Aro: Michael Sheen