With SPlat I started to thumbs down: SoSac decks, 12 of those will just deck out me, big stall decks that have nothing to do with the oracle card(example: mono aether with 12 SoGs), Ghostmares w/o SoV, those usually get killed with a good hand from me, but if they start to draw lock you, it's annoying, decks with 12 BHs, different monos with triple mark to splash oracle cards and the most annoying: rainbows that just splashed the oracle card(Rainbows with nova/QT wont get thumbs down).
Rest is pretty much Thumbs up, depends on some decks though.