Serial killers are a good example. Its said that there are a hundred or so roaming the united stated any any given time ( number is not accurate but you get the point ).
The creepy thing is that you don't know who they are. Supposedly they look like anyone else. The old man who runs the corner store could be one, so
Could the local dentist, florist, milfy mom, or that teenage kid on the corner who does nothing but mope around all day looking depressed.
The biggest challenge is that in ps nobody really dies, so while a rl killer can manage his or her exposure by offing people, that does not work in planeshift.
People come back from the dr and remember. This led me to believe that perhaps killing in ps is not such a great idea.
If you want to get away from killing and do some other evil things, here are some ideas:
* remove a limb and leave the victim there. This adds a little chaos to the game. You don't know if the player will live or die, plus they have some incentive to come after you for their arm (or revenge if its gone black and pruny )
* attack some's reputation / credibility
* frame another player
* cheat on a loved one
* seduce someone else's significant other
* spike the next picnic's food with psychadelic mushroom sauce
* cook up a ylian and feed him to a large crowd - don't forget the honey mustard sauce
* curse someone
* play a seemingly harmless prank that's not so harmless
Just my opinion, but this is where the creativity comes in - finding something that has not been done in a while and giving it your own spin.
Oralon recently made a smoking poisonous sack from some kind of plants. I thought this was refreshingly creative. Too bad I wasn't there to see it.
Chaotic characters can add some nice surprises. Vayl was in my opinon, the master of chaos

when vayl was around you never knew what she might pull.
For those who followed jacula's bloodline rp, mellas was a chaotic good. Note some of the unpredictable things her character did for love.
Personally I really like characters that have some personality to them. Mogweh had a very good talent for this. When you rp'd with one of his characters you
Would really get a strong feel for his character's personality. He used a vombination of accent, consistent manerisms, and phrases for each character. If were to read the
Text from one of the characters without seeing the name it would not take long to figure out chich character you were talking to.
Lhaa and Aiwendil were anothe excellent example if sticking to your character. When they played they *lived* their characters.
Say something stupid to lhaa and she'd narrow here eyes and tell you off with a consistent accent. Aiwendil was consistently bubbly and cheerful.
Telnavi was always, warm, friendly, and perhaps a little flirtatious. This was consistent. When you spoke with Tel, you didn't feel like you were speaking with anyone else but Tel.
Each of these characters had well defined personalities that made them very very real.
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Sorry, didn't mean to go on a tangent