Overall, in the 30 years I've been playing one fantasy RPG or another, not often. But as a DM, I only kill PCs if they deserve it. I've also had players raise NPCs, in one case because Raise Dead was prepared and Speak With Dead wasn't. The nature of the death was such that the NPC in question was happy to have a second chance. As a player, I've had two characters die and return in all that time... both more than once. The second is a character I'm currently playing (and have been for three years now) in a 3.5 campaign, a paladin of a death goddess. Turns out she had an ulterior motive in sending me back (a process she normally frowns upon); her church had been hijacked from within by an extremist group seeking to bring back her predecessor, an old-style death god who demanded regular human sacrifice. Cleaning up that mess was the topic of our previous-to-last game session. Looks like the new high priest is going to be my paladin's henchman; he's the highest-level cleric left in the church, as far as we know. Oh, and there's the fact that my paladin was an apostate due to his personal approval of "white" necromancy (the entire school of magic was banned by the main church, and now we know why... methinks they did protest too much), which did not result in his loss of divine powers. What this all means for the future of the faith is yet to be determined.