Well, the voting has ended for the first poll on Word on the Streep, and The Hours is the overwhelming top vote-getter (71%) to decide which performance was the biggest Oscar snub for Meryl. I was one of the few who voted for The Manchurian Candidate. While I absolutely believe Meryl should've been nominated for her performance as Clarissa Vaughan in The Hours, if we take into account the landscape of the films and performances that were up for recognition in both 2002 and 2004 (the release years for The Hours and The Manchurian Candidate, respectively), it's more of a snub that she missed out in 2004.
The Hours happened to be released the same year as Adaptation, a film for which she was nominated for Actress in a Supporting Role. Couple that with the fact that The Hours was a film that essentially had three female leads in Nicole Kidman (ultimate winner that year in lead for her role of Viginia Woolf), Julianne Moore (nominated in supporting) and Meryl, and it gets tough to nominate two or especially all three. If each were on the cusp of being lead or supporting and Kidman's performance was sort of undeniable for a nom, Meryl really had no chance for that film. Keeping in mind that actors cannot be nominated for two roles in the same category.
Two years later, Streep missed out on a nomination for Actress in a Supporting Role for her performance as Senator Eleanor Prentiss Shaw The Manchurian Candidate. She had no other films that year that were likely to result in nomination, and she had snagged both Globe and BAFTA noms. I won't rehash why I think she should've been recognized, but I'll link my thoughts from the original snub post.
What do readers want as the next poll?!