John Travolta playing Shapiro
That didn't bother me at all, despite reading that he was widely criticized for his performance. Cuba Gooding Jr. as OJ threw me for a loop - he just looks like himself. But the intensity and anger in his eyes and performance won me over.
Sarah Paulsen was amazing. The guys that played Darden and Johnnie Cochran were also spot-on too.
If you haven't watched the ESPN 30 for 30 documentary film on the trial, it was absolutely fascinating.