Oh, I can HATE video game characters with a passion, but, for some reason, that just doesn't translate over to DA or Mass Effect or Bioware games in general. Instead I find myself appreciating all the characters for what they are instead of being all "You little sh!t, why do I have to put up with you for the entire game?!"
Hell, maybe it's the roleplay aspect that leads me to be like that? While I'm just appreciating the characters for how they're written, my Warden/Hawke/Shepard are free to hate who they wanna hate without my personal feelings clouding how much I can roleplay. I honestly have no idea. o.o
I think it's maybe the writing.
I also think that's why, for me anyway, there's sometimes real hatred. Ok, not *hatred*, but...for example-as a mother, I want to have the option for my warden to, in no uncertain terms, tell Isolde that she's a selfish, selfish woman, and she is why Redcliffe can't have nice things.
I kind of hate her, and I wouldn't, if her writing (and her VO, to be sure) weren't so on point.
And while I *love* Tim Curry's voice (dear gods.), with my Cousland, Rendon Howe's last words make me want to revive him and shank his ass again. 
That's what sucked me in, to be honest-a world full of characters I give a sh!t about, one way or another. 