Angel had one of the biggest redemption arcs on the show, so that was why it was hard for me to pick between him and Faith, but I ultimately picked Faith. The reason is because it was more compelling to me and I respect it as much as I do Angel's since it was much deserved as his. I don't understand the voting for Spike or if someone would pick Willow's or Harmony's.Well, I was the one and only person to vote for Angel.
I guess having a non-linear redemption story that began before the shows start and by far the most-extensive and challenging atonement arc takes a character out of the running.
Even I didn't realize his arc was this underrated.
Simple answer: betrayal of friends with memory wipes and deceit, his self-indulgent competition against Spike, especially (but not limited to) over Buffy. Other stuff, too.Why? Was it because he had to take the job at Wolfram&Hart so his offspring could have a normal life?