If there's genocide anywhere I advocate at least some form of pressure or assistance required to end the genocide. North Korea is too close with China for me to advocate a direct military intervention, though.
Syria occupies a choke-point in the world economy, too important to be left to fascistic dictators. Our enemies in Tehran and our rivals in Moscow and Beijing all have played their cards in regards to Syria. There's always the chance for Hezbollah, or worse, al-Qaeda, to get their hands on Assad's stash of chemical weapons. And Syria, as opposed to many places in Africa, has the chance to transform into a viable democracy after the civil war.