In my opinion, the main problem with "being a dick" in RPGs is the game itself. It's like they added in the more evil options as an afterthought, not expecting anyone to actually choose them. It's especially true in BioWare games, another problem being that they tend to have only 3 dialogue options which are obviously "good" "neutral" or "evil".
In contrast, Obsidian games tend to be very well polished in the moral dilemma department, although often other parts of the game suffer, eg: the gameplay in KotOR2.
If you want a game with some well designed moral choices I highly recommend Neverwinter Nights 2, although this suffers from awful camera control unless you have the expansion pack "Mask of the Betrayer" and the game is fully updated.
In contrast, Obsidian games tend to be very well polished in the moral dilemma department, although often other parts of the game suffer, eg: the gameplay in KotOR2.
If you want a game with some well designed moral choices I highly recommend Neverwinter Nights 2, although this suffers from awful camera control unless you have the expansion pack "Mask of the Betrayer" and the game is fully updated.