In my RIFTS game, we have the following characters:
-A good aligned human Ley Line Walker (that's basically a wizard for you non-Rifters.)
-A good aligned D-Bee who uses weapons and armor created by biowizardry (another type of magic.)
-An evil aligned D-Bee whose species hates magic.
-A selfish aligned* D-Bee whose species hates... well, every other species.
As you can imagine, there are intra-party conflicts. Not only between one another in terms of goals, life-view, etc, but in terms of how they react to the setting and the NPCs.
I have to say that my Rifts group is one of the few groups I've GMed for who manage to do these three things well:
1. Play up their character even when it brings them into direct conflict with other players,
2. Play out that conflict realistically rather than escalating it to immediately into PC vs. PC combat
3. Keeping PC conflict from going OOC.
The players don't ignore or compromise their characters' beliefs, personalities, etc and they manage an attitude of "I don't like you, but we're in this together and we can't survive it without the group."
*The player has refused to pick an alignment, but his character acts in a pretty consistently self-centered fashion, so I've mentally assigned him this alignment.
What about you, dear readers? What are your good experiences with PC-vs-PC conflict? I mean, I could fill an entire blog with the bad experiences I've had as both player and GM, but let's talk about the times when the players made it something that adds to the game and makes it more interesting.