No respect for civil liberties HP
Spied on, disrupted, and generally cracked down on Occupy Wall Street in spite of Occupy not actually breaking any laws; has had absolutely no respect for the Fourth Amendment or the Constitution as a whole during his Presidency in spite of his background as a 'constitutional law professor', expanded the surveillance state, assassinated American citizens on his own supposed authority to do so without any constitutional logic backing that up
Continued the war in Afghanistan after the death of Osama bin Laden for no reason at all really; intervened in Libya and now in the process of intervening in Syria; waging a multi-front war in the Middle East without congressional oversight or approval, has positioned the United States as an anti-China player in the Pacific in spite of that country not actually doing anything to the United States, continuing the saber-rattling with Iran and North Korea
TNF's stuff (I've selected my favorite two) really sum it up here.