I for one wanted to go to the Asmodians side. I always thought that if you walk in a dark world all the time you will feel not very happy. I thought it was just a crazy idea of myself till I suddenly saw in a dev interview from warhammer the following:
Take the chaos side for one, people don't like being in dark areas all the time without any " happy " environments. In warhammer they inserted funny things on the dark side like the good classic farts

to make you laugh.
Cause to be honest I didn't saw any idea for Aion. I don't even think they even thought about the fact people will get a bit depressed / don't like running around in shadows all day long fighting dark things, talking to dark npcs etc. I have seen a lot of pics from the dark side and well they were very nice to see don't get me wrong but to play day in day out in a dark environment after your work / school / other real life matters ?

Maybe subconscious Reqiuem failed this way
This has nothing to do with being sensitive or other crap

just plain logic sense.
Any comments about this would be appreciated ^^
Cheers