Characters we hate and love
If I were to choose one it would be the Villain, though my hero gives him/her a good close run. My villain's dark side is a strong lure. He/she (he) gets little to no love from the reader. The other characters constantly call his values into question. He/she (I just say he from now on) makes selfish decisions or decisions no other understands.
But wait! He has a twisted back story. He's been hurt, abused, mistreated. Betrayed! He trust no one and with good reason. Read more on The Literary Hub