Well, Light and L both have their good points. I like Light's intentions at the begining, but it really is impossible to create a perfect world if you think about it. ( gonk Nooooooooooooo!!!! gonk )There's always a flaw that get's in the way. In this case, that's the Japanese equivelent of the FBI. (I forgot what it was called. sweatdrop ) Not to mention L get's involved too. I really like L's style, though. I like how he has to take off his shoes and prop up is legs when he sits in order to reach his full thinking capacity. I like characters with limits and styles like that. It's a two sided deal for me.
It always bothers me that both their names begin with 'L'. I sometimes get confused and think that L's name is an abriviation of Light's! confused