Orcs/YMMV

Complete Monster: Jennesta. And how. Her sister, Adpar, is no better.
Everybody Remembers the Stripper: There's a very graphic rape scene early in the first book. This is apparently where some people stopped reading.
Evil Is Sexy: Jennesta and Adpar.
Hate Dumb: You wouldn't believe the amount of people who think that this series is terrible just because the orcs don't fit their perceived view of what orcs should be like.
High Octane Nightmare Fuel: The Sluagh.
Squick: Jennesta's... fascination with Aidan Galby (who happens to be a prepubescent young boy) is extremely squickworthy, to say the least.
Tear Jerker: The death of Alfray.