Maybe it's just me, but for the most part, casting decisions don't really excite me, and I mostly find them meaningless. If a part is well-written and well-directed, a no name is often just as likely to deliver a great performance as a big name, and vice-versa. Samuel L. Jackson is my personal poster child for this. When his lines are well-written and he is well directed, he is one of my favorite actors, as in 187. When his lines are poorly written and/or he is poorly directed, he is one of my least favorite, as in the Star Wars prequels.