Favourite Acting Performances

Forest Whitaker in The Last King of Scotland stands out the latest years IMO. He's been doing a lot of good work lately btw.
 
It is interesting that the vast majority of examples given here are male roles.


The first person that comes to mind is Vivien Leigh as Scarlett O'Hara in Gone With the Wind, she makes it the classic that it is.
 
Slyvester Stallone - Rocky
Sigourney Weaver - Aliens
Jack Nicholson - One Flew Over The Cuckoo's Nest