I won't be voting, but it's because I haven't lived in the US for almost two years.
Voting is a privilege in the US, and it always pains me when I hear people say that their vote doesn't matter. One only need remember the events in Florida a couple of years ago to see just how much it does matter. When you consider that people have died fighting for the right to vote, it should be of utmost importance for every person of legal voting age.