My one big problem in Wyatt Earp
I like the movie but this is something that is just painful to watch: When Costner plays the young Wyatt driving a stage it seems that his understanding of the character was such that he was a mentally deficient (retarded) young man of forty-five years old.
Apparently to Costner, the way to portray Earp in his young days was to have him appear simple and goofy, with a bit of "aw, shucks" wholesome naiveté. I just thought this was an area where the movie, particularly Costner's acting, really fell apart. And this is on top of the fact that no matter how simple Costner appeared, he could still not convincingly come off as a roughly twenty-ish year old boy.