[rado]

Jason Momoa was 100% Jason Momoa. His (lack of) characterisation was so bad I stared at his scenes in disbelief.

[bena]

To be fair, Patrick Stewart was 100% Patrick Stewart when he played the role.

[jhbadger]

Although that's really only recognizable in hindsight. In 1984 Stewart was still a fairly obscure character actor who had minor parts in BBC shows like I, Claudius.