I just don't understand why people like D&D so much and disregard other RPG systems... Usually, playing D&D involves insane amounts of both random and planned encounters and is very "hack&slash" oriented. Back in the day, I used to run games of Dark Sun, Spelljammer, Ravenloft... But in these games settings, the players used to go for the most straightforward plans. Once, after a specially weird (and VERY bloody) gaming afternoon, i decided that I would not be a surrogate gaming console for my gamers. If they feel like killing things an entire day, they can buy an Xbox (or a Playstation).
It took me some Cyberpunk 2020 games to reset my players' software and restart them in "cautious" mode. Nothing as a couple of friday night gunfights to make anyone realize getting involved in violence is usually a bad idea.
Then the World Of Darkness games allowed me to do some innovative role-playing. That is, until some of the players began to screw it up and fell again into their violent tendences' grasp. Then the campaign fell apart and we didn't have enough time to set it right again.
Oh, well... (rant mode off)