There is really one, and only one character from a past Obsidian game which I would kill to never see the likes of every again.
And that is Kreia.
I hate her.
Actually no, let me rephrase that. I LOATH her.
Never in a game have I had such a powerfull urge to just flat out murder a party member. Correction, flat out murder a character before., party member or otherwise.
Every single other character that has thus far been mentioned has at the absolute worst produced a "::shrug:: whatever" reaction.
So please Obsidian, I beg of you, don't go down this road again. Or if you do, please let me pen her in the dead book or at least ignore her entirely.
Oh, and on a lesser note, try and not repeat Bao-Dur either. I didn't hate him, but he was just so... bland. To put it bluntly, he made Kaiden and Jacob (of the ME fame) look like wild and crazy guys in comparison.