For the record Sion's accent was as subtle as a punch to the face.Foxpack1 said:KOTOR2- Darth Sion's subtle Scottish accent and Kreia's awesomeness.
I would say Mass Effect was very good, primarily for Grunt Wrex and Garrus. Kasumi was very well done too.
As another has said Arkham Asylum had the best Joker I've ever seen, primarily because Mark Hamill is incredible.
Most of Rockstar's work is very good as well, on the same level as BioWare.