Ciaran Hinds in Persuasion is fantastic - best Austen book imo and this is also the best adaptation of them all.
I really liked Emma T in S&S, despite the fact she was too old. Her acting in it is so moving.
Thingumybob Sutherluand in the KK P&P is fantastic - the scene at teh end of the film where he has just spoken to Lizzy is wonderful. I actually really like that adaptation - KK is not such a pouting twat as she is normally.
Billie Piper as Fanny price - what a travesty.