I liked X3 Beast too - he was probably the best thing in the movie, although I also liked the general group dynamic in the final fight too. X3 would have been far better if they had eased gently into the Dark Phoenix story and made the B plot her seduction by the Hellfire club instead of just letting her gurn her way through the movie. A real waste of Famke - she hardly wore any black leather in the entire movie.
I definitely agree with this post. Grammer was a great Beast and a perfect piece of casting. The action was very good and the team they had (Wolverine, Storm, Shadowcat, Colussus, Beast, and Iceman was a good one.